MESON Chess Problem Database

Problem Display
PID: 86809 (6Q1/8/3pP3/1K1PP2p/1b1k1p1r/4RB2/3B4/3R3n w - - 0 1)

Pilchenko, Viacheslav Karlovich

1st Prize, Uralski Skazi-90 JT, 1990

6Q1/8/3pP3/1K1PP2p/1b1k1p1r/4RB2/3B4/3R3n

#2

9 + 7

6490 yacpdb 2009
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Bc1#
    • 1...Bc5
      • 2.Bc1#
  • Tries
    • 1.Rd3+?
      • 1...Kxe5
        • 2.Qg5#
      • 1...Kxd3!
    • 1.Re4+?
      • 1...Kxd5
        • 2.Bc3#
        • 2.Bxb4#
        • 2.e7#
      • 1...Kd3!
    • 1.Qg1?
      • threat
        • 2.Bc3#
        • 2.Bxb4#
      • 1...Bxd2
        • 2.Rxd2#
      • 1...fxe3
        • 2.Qxe3#
      • 1...Rh2
        • 2.Bc3#
      • 1...Ba3
        • 2.Bc1#
        • 2.Be1#
        • 2.Bc3#
        • 2.Bb4#
        • 2.Ba5#
      • 1...Bc3
        • 2.Bxc3#
      • 1...Ba5
        • 2.Bc3#
        • 2.Bb4#
        • 2.Bxa5#
      • 1...Bc5
        • 2.Bc1#
        • 2.Be1#
        • 2.Bc3#
        • 2.Bb4#
        • 2.Ba5#
      • 1...Sf2!
    • 1.Qg7?
      • threat
        • 2.exd6#
      • 1...Bxd2
        • 2.Qa7#
      • 1...fxe3
        • 2.Bxb4#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Rg4!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qc4#
      • 1...Bxd2
        • 2.Qc3#
      • 1...fxe3
        • 2.Bc3#
      • 1...Bc5
        • 2.Bc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(b);N_GUARD::R(A)+B(B)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(G)::QAR2(I)
      • Refutation
        • K(c);P-FLIGHT,XR(C)
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);OGATE,P_SPINB(b),XB(B)::R(A),XB(b)
        • P(d);OGATE,P_SPINP(d),XR(C)::QAB1(I),XP(d)
        • R(e);::R(A)+B(B),DCHECK
        • B(b);::R(A)+B(B),DCHECK,XB(b)
      • Refutation
        • S(a);
    • Try
      • Q(I);
      • Threat
        • QAB(I)+P(G),XP(g)
      • Vars
        • B(b);N_GUARD,P_SPINB(b),XB(B)::QAB(I)
        • P(d);SBLOCK,XR(C)::R(A)+B(B),XB(b)
        • P(g);OGATE,P_SPINP(g),XP(G)::QAB1(I),XP(g)
      • Refutation
        • R(e);
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • B(b);N_GUARD,P_SPINB(b),XB(B)::QAB1(I)
      • P(d);SBLOCK,XR(C)::R(A)+B(B),DCHECK
      • B(b);N_GUARD::R(A)+B(B)
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