MESON Chess Problem Database

Problem Display
PID: 143011 (1K4nb/3p4/2bpp1Qn/1pPk3P/8/BPpNPp2/r1B2P2/1r1R4 w - - 0 1)

Kriuckov, Aleksandr

British Chess Magazine, 1935

1K4nb/3p4/2bpp1Qn/1pPk3P/8/BPpNPp2/r1B2P2/1r1R4

#2

11 + 13

14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Bxb3#
    • 1...Bd4
      • 2.e4#
    • 1...Be5
      • 2.Sf4#
    • 1...e5
      • 2.Sc1#
      • 2.Sf4#
  • Tries
    • 1.Sc1+?
      • 1...Bd4
        • 2.Qe4#
      • 1...Ke5!
    • 1.Se1+?
      • 1...Rxd1
        • 2.Qe4#
      • 1...Bd4
        • 2.Qe4#
      • 1...Ke5!
    • 1.Sb2+?
      • 1...Rxd1
        • 2.Qe4#
      • 1...Bd4
        • 2.Qe4#
      • 1...Ke5!
    • 1.Se5+?
      • 1...Rxd1
        • 2.Qe4#
      • 1...Kxe5!
    • 1.Qg5+?
      • 1...Ke4
        • 2.Sb2#
      • 1...Be5
        • 2.Sc1#
        • 2.Sf4#
      • 1...e5
        • 2.Sf4#
      • 1...Sf5!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qxf3#
      • 1...Ke4
        • 2.Sb2#
      • 1...Rxb3
        • 2.Se5#
      • 1...dxc5
        • 2.Sb4#
      • 1...e5
        • 2.Sf4#
      • 1...Sf6
        • 2.Sc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(a);OGATE,XP(E)::B(B),XR(a)
    • B(m);SBLOCK::P(G)
    • B(m);SBLOCK::R(A)+S(F),DCHECK
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(m);P_SPINB(m)::QAB1(J)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • R(a);XR(A)::QAB1(J)
        • B(m);P_SPINB(m)::QAB1(J)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • R(a);XR(A)::QAB1(J)
        • B(m);P_SPINB(m)::QAB1(J)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • R(a);XR(A)::QAB1(J)
      • Refutation
        • K(f);P-FLIGHT,XS(F)
    • Try
      • Q(J);CHECK
      • Vars
        • K(f);S_FLIGHT::B(B)+S(F)
        • P(i);P_SPINP(i)::R(A)+S(F),DCHECK
      • Refutation
        • S(j);P_SPINS(j)
  • Actual
    • Q(J);
    • Threat
      • QAB(J),XP(d)
    • Vars
      • K(f);S_FLIGHT::B(B)+S(F)
      • R(a);N_GUARD,XP(E)::R(A)+S(F)
      • P(h);SBLOCK,XP(H)::R(A)+S(F),DCHECK
      • P(i);SBLOCK::R(A)+S(F),DCHECK
      • S(l);S_CUTB(m)::R(A)+S(F)
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