MESON Chess Problem Database

Problem Display
PID: 6439 (5k1r/6NP/1p2P2P/2qP1NK1/1B6/bB3R2/1P6/2R5 w - - 0 1)

Loshinski, Lev Ilich

Shakhmatny Listok, 1929

5k1r/6NP/1p2P2P/2qP1NK1/1B6/bB3R2/1P6/2R5

#2

12 + 5

5314 Grossmeister Shakhmatnoi Kompozitsii 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb4
      • 2.Rc8#
    • 1...Qd6
      • 2.Rc8#
    • 1...Qe7+
      • 2.Sxe7#
  • Tries
    • 1.e7+?
      • 1...Qxe7+
        • 2.Sxe7#
      • 1...Kf7!
  • Keys
    • 1.d6!
      • threat
        • 2.e7#
      • 1...Qg1+
        • 2.Sg3#
      • 1...Qe3+
        • 2.Sxe3#
      • 1...Qxc1+
        • 2.Se3#
      • 1...Qxf5+
        • 2.Rxf5#
      • 1...Qxd6
        • 2.Rc8#
      • 1...Qc4
        • 2.Sd4#
      • 1...Qd5
        • 2.Rc8#
      • 1...Qe5
        • 2.Rc8#
      • 1...Qc7
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_SPINQ(b),OGATE,XB(E)::R(A)
    • Q(b);OGATE::R(A)
    • Q(b);CHECK::R(D)+S(G),XQ(b)
  • Tries
    • Try
      • P(I);CHECK,N_PINQ(b)
      • Vars
        • Q(b);CHECK,P_SPINQ(b),XP(I)::R(D)+S(G),XQ(b)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • P(F);N_PINQ(b),P_SPINS(G)
    • Threat
      • P(I)
    • Vars
      • Q(b);CHECK,N_PINS(G)::R(D)+S(G)
      • Q(b);CHECK,N_PINS(G)::R(D)+S(G),XQ(b)
      • Q(b);CHECK,N_PINS(G),XR(A)::R(D)+S(G)
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(G)::R(D),XQ(b)
      • Q(b);N_PINS(G),OGATE,P_SPINQ(b),XP(F)::R(A)
      • Q(b);N_PINS(G)::R(D)+S(G)
      • Q(b);OGATE::R(A)
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