MESON Chess Problem Database

Problem Display
PID: 271335 (2n2NN1/2qR3p/B1P3p1/2p1Pkr1/Q1R5/p7/K1p1r1Pb/2B5 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Lokker, Miklosh S

Buletin Problemistic, 1974

2n2NN1/2qR3p/B1P3p1/2p1Pkr1/Q1R5/p7/K1p1r1Pb/2B5

#2

11 + 11

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Rxc5#
  • Tries
    • 1.Rf4+?
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Kxe5!
    • 1.Rd5?
      • threat
        • 2.Sh6#
      • 1...Qxe5
        • 2.Bxc8#
      • 1...Rxe5
        • 2.Qxc2#
      • 1...Bxe5
        • 2.Rf4#
      • 1...Rh5
        • 2.g4#
      • 1...h6
        • 2.Sxh6#
      • 1...Qg7!
    • 1.Qxc2+?
      • 1...Kxe5
        • 2.Rxc5#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rxc2+!
    • 1.g4+?
      • 1...Kxe5
        • 2.Rxc5#
      • 1...Rxg4!
  • Keys
    • 1.Rxc5!
      • threat
        • 2.Sh6#
      • 1...Qxe5
        • 2.Rf7#
      • 1...Rxe5
        • 2.Bd3#
      • 1...Bxe5
        • 2.Qf4#
      • 1...Rh5
        • 2.g4#
      • 1...h6
        • 2.Sxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(f);OGATEB,P-FLIGHT,XP(F)::R(E),XP(e)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • B(c);OGATE,XR(E)::QAR1(D),XB(c)
      • Refutation
        • K(f);P-FLIGHT,XP(F)
    • Try
      • R(I);
      • Threat
        • S(K)
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i),XP(F)::B(G),XS(k)
        • R(b);N_GUARD,P_SPINR(b),XP(F)::QAB(D),XP(a)
        • B(c);N_GUARD,P_SPINB(c),XP(F)::R1(E)
        • R(g);N_GUARD::P(C)
        • P(j);::S(K),XP(j)
      • Refutation
        • Q(i);
    • Try
      • Q(D);CHECK,P_SPINQ(D),XP(a)
      • Vars
        • K(f);N_GUARD,P-FLIGHT,S_CUTR(b),S_CUTR(b),XP(F)::R(E),XP(e)
        • R(b);N_PINQ(D),P_SPINR(b)::QAB1(D),XR(b)
      • Refutation
        • R(b);CHECK,XQ(D)
    • Try
      • P(C);CHECK
      • Vars
        • K(f);P-FLIGHT,S_CUTR(g),XP(F)::R(E),XP(e)
      • Refutation
        • R(g);XP(C)
  • Actual
    • R(E);XP(e)
    • Threat
      • S(K)
    • Vars
      • Q(i);N_GUARD,P_SPINQ(i),XP(F)::R(I)
      • R(b);N_GUARD,P_SPINR(b),XP(F)::B(G)
      • B(c);N_GUARD,P_SPINB(c),XP(F)::QAR1(D)
      • R(g);N_GUARD::P(C)
      • P(j);::S(K),XP(j)
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