MESON Chess Problem Database

Problem Display
PID: 54755 (3R1N2/2pn1p2/2p5/3kB1Q1/5P2/1K1n3q/5N2/3R3b w - - 0 1)

Soroka, Ivan Ivanovich

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

3rd Prize, Erokhin-60 JT, 1997

3R1N2/2pn1p2/2p5/3kB1Q1/5P2/1K1n3q/5N2/3R3b

#2

8 + 8

23 Die Schwalbe 2003

SOLUTION

  • SOUND
  • Tries
    • 1.Bd6+?
      • 1...Kd4
        • 2.Bc5#
      • 1...Kxd6
        • 2.Qe5#
      • 1...Qf5
        • 2.Rxd3#
      • 1...Se5
        • 2.Qxe5#
      • 1...f5!
    • 1.Bf6+?
      • 1...Kd6
        • 2.Be7#
        • 2.Qe5#
      • 1...Qf5!
    • 1.Rxd7+?
      • 1...Kc5
        • 2.Bd4#
      • 1...Qxd7!
  • Keys
    • 1.Bd4+!
      • 1...Kxd4
        • 2.Qe5#
      • 1...Kd6
        • 2.Bc5#
      • 1...Qf5
        • 2.Rxd7#
      • 1...Se5+
        • 2.Be3#
      • 1...f5
        • 2.Rxd7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(d);P-FLIGHT::B(E)
        • K(d);P-FLIGHT,XB(E)::QAB1(F)
        • Q(c);P_SPINQ(c)::R(A),XS(b)
        • S(g);N_GUARD::QAR1(F),XS(g)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • B(E);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • R(G);CHECK,XS(g)
      • Vars
        • K(d);N_SPINS(b),P-FLIGHT::QAR(F)+B(E),DCHECK
      • Refutation
        • Q(c);XR(G)
  • Actual
    • B(E);CHECK,N_PINS(b),P_PINS(g)
    • Vars
      • K(d);N_SPINS(g),P-FLIGHT,P_SPINS(b),XB(E)::QAB1(F)
      • K(d);P-FLIGHT::B(E)
      • Q(c);P_SPINQ(c)::R(G),XS(g)
      • S(b);CHECK,N_SPINS(g),P_SPINS(b),S_CUTP(h),S_CUTQ(c)::R(A)+B(E)
      • P(h);P_SPINP(h)::R(G),XS(g)
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