MESON Chess Problem Database

Problem Display
PID: 276648 (4K3/B2p2p1/2PpRP2/1BpkP1PQ/3N1R2/4P3/n6n/8 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Yakimovich, Daniil

Best Problems, 2023

4K3/B2p2p1/2PpRP2/1BpkP1PQ/3N1R2/4P3/n6n/8

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qf3#
      • 2.Qh1#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sg4
      • 2.Qh1#
    • 1...c4
      • 2.e4#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Rxd6#
      • 1...Kxe6
        • 2.Qf7#
      • 1...dxe5
        • 2.Bc4#
      • 1...dxe6
        • 2.e4#
      • 1...Sxf3!
    • 1.Re7?
      • threat
        • 2.Qf7#
      • 1...dxe5
        • 2.Rxd7#
      • 1...g6!
    • 1.Qd1?
      • threat
        • 2.e4#
      • 1...cxd4
        • 2.Qb3#
      • 1...dxe6
        • 2.Sf3#
      • 1...Sc3!
    • 1.Qe2?
      • threat
        • 2.Bc4#
        • 2.Qc4#
      • 1...cxd4
        • 2.Qc4#
        • 2.Qxa2#
      • 1...c4
        • 2.Bxc4#
        • 2.Qxc4#
        • 2.e4#
      • 1...dxe6!
    • 1.g6?
      • threat
        • 2.Rxd6#
        • 2.exd6#
      • 1...cxd4
        • 2.Rxd6#
      • 1...dxe5
        • 2.Qxe5#
      • 1...gxf6
        • 2.Rxd6#
        • 2.exf6#
      • 1...Sf3
        • 2.Rxd6#
        • 2.Qxf3#
      • 1...Sg4
        • 2.Rxd6#
        • 2.Qh1#
      • 1...dxe6!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Re7#
      • 1...dxe5
        • 2.Qxd7#
      • 1...dxe6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::QAB(G),XS(b)
    • S(b);OGATE::QAB(G)
    • P(c);::P(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • R1(I),XP(e)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(I)::QAB1(G)
        • P(e);XP(E)::B(D)
        • P(f);SBLOCK,XR(I)::P(A)
      • Refutation
        • S(b);XS(B)
    • Try
      • R(I);
      • Threat
        • QAB(G)
      • Vars
        • P(e);OGATEB,SBLOCK,XP(E)::R(I),XP(f)
      • Refutation
        • P(g);
    • Try
      • Q(G);
      • Threat
        • P(A)
      • Vars
        • P(c);N_GUARD,P_SPINP(c),XS(B)::QAB(G)
        • P(f);SBLOCK,XR(I)::QAR(G)+S(B)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Refutation
        • P(f);XR(I)
    • Try
      • P(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XS(B)::R1(I),XP(e)
        • P(e);OGATE,P_SPINP(e),XP(E)::QAR1(G),XP(e)
      • Refutation
        • P(f);XR(I)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+R(I)
    • Vars
      • P(e);OGATEB,XP(E)::QAR2(G),XP(f)
      • P(f);OGATE,P_SPINP(f),XR(I)::QAB1(G),XP(f)
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