But ... R:f2 is forced. Anyway
12.g R:f2 (instant move)
13.r R:g14 (instant move)
[Variant "FFA"]
[RuleVariants "DeadKingWalking EnPassant Antichess"]
[CurrentMove "49"]
1. k2-k3 .. b9-d9 .. f13-f11 .. m4-l4
2. k3xl4 .. b10-c10 .. g13-g12 .. Nn5xl4
3. Rk1xk13 .. Ba9xe13 .. Bf14xm7 .. Qn8xBm7
4. Rk13xj13 .. Be13xm5 .. Qh14xb8 .. Qm7xh2
5. Rj13xi13 .. Bm5xBn6 .. Qb8xb11 .. Kn7xBn6
6. Ri13xh13 .. Ra11xQb11 .. Bi14xm10 .. Bn9xBm10
7. Rh13xd13 .. Rb11xf11 .. g12xRf11 .. Bm10xe2
8. Rd13xd9 .. c10xRd9 .. Rd14xd9 .. Be2xBf1
9. Qg1xBf1 .. b5-d5 .. Rd9xm9 .. Qh2xKh1
10. Qf1xBa6 .. Qa7xQa6 .. Rm9xm11 .. Qh1xNe1
11. Rd1xQe1 .. Qa6-f1 .. Rm11xm8 .. Rn11xf11
12. Re1xNe14 .. Qf1xf2 .. Rm8xKa8 .. Rf11xQf2
13. Re14xKg14
Blue (@brooklynzhang) to move
Green (@MrXX2018) to move.