MESON Chess Problem Database

Problem Display
PID: 168174 (1q6/1B6/1Bb1r3/P1P1r1R1/3k1NNR/pP2pP2/1b1PP3/3QK3 w - - 0 1)

Loshinski, Lev Ilich

Umnov, Evgeny Ivanovich

64 Shakhmatnoe obozrenie, 1929

1q6/1B6/1Bb1r3/P1P1r1R1/3k1NNR/pP2pP2/1b1PP3/3QK3

#2

14 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Sxe6#
      • 2.Bxc5#
    • 1...Rd5
      • 2.Sxe6#
    • 1...Ba1
      • 2.Qxa1#
    • 1...Bd5
      • 2.c6#
    • 1...exd2+
      • 2.Qxd2#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qd3#
        • 2.Qc4#
      • 1...exd2+
        • 2.Qxd2#
      • 1...Bc3
        • 2.Qd3#
        • 2.Qxc3#
        • 2.dxc3#
      • 1...Be4
        • 2.Qc4#
        • 2.dxe3#
      • 1...Bd5
        • 2.Qd3#
        • 2.c6#
      • 1...Bb5!
  • Keys
    • 1.Sd5!
      • threat
        • 2.dxe3#
      • 1...exd2+
        • 2.Qxd2#
      • 1...Kxd5
        • 2.Sxe3#
      • 1...Rxd5
        • 2.Se5#
      • 1...Bxd5
        • 2.c6#
      • 1...Bc3
        • 2.dxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD::S(G),XR(g)
    • B(a);OGATEB::QAB(A),XB(a)
    • B(f);OGATE::B(M)+P(K)
    • P(c);CHECK,OGATE,P_PINP(D),P_SPINP(c),XP(C)::QAR2(A),XP(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);CHECK,OGATE,P_PINP(D),XP(C)::QAR2(A),XP(c)
      • Refutation
        • B(f);
  • Actual
    • S(G);
    • Threat
      • QAR(A)+P(C)DCHECK,XP(c)
    • Vars
      • P(c);CHECK,OGATE,P_PINP(D),P_SPINP(c),XP(C)::QAR2(A),XP(c)
      • K(d);P-FLIGHT,P_SPINB(f),P_SPINR(e),XS(G)::S(H),XP(c)
      • R(e);SBLOCK,XS(G)::R(I)+S(H)
      • B(f);OGATE,SBLOCK,XS(G)::B(M)+P(K)
      • B(a);OGATE,P_PINP(C)::QAR(A)+P(C)DCHECK,XB(a)
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