MESON Chess Problem Database

Problem Display
PID: 177762 (3r2n1/1P2p3/5p2/3PkN2/5N2/2PqpPKB/1R6/Bb1R4 w - - 0 1)

Burmistrov, Sergey Gennadevich

1/2 Prize, Sahs (Latvia), 1990

3r2n1/1P2p3/5p2/3PkN2/5N2/2PqpPKB/1R6/Bb1R4

#2

11 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sg6#
    • 1...Qc2
      • 2.Sg6#
    • 1...Qe2
      • 2.Sg6#
    • 1...Qc4
      • 2.Sg6#
    • 1...Qe4
      • 2.Sg6#
    • 1...Qb5
      • 2.Sg6#
    • 1...Qa6
      • 2.Sg6#
    • 1...Qxc3
      • 2.Sg6#
    • 1...Qd4
      • 2.cxd4#
  • Tries
    • 1.Rxd3?
      • threat
        • 2.Sg6#
      • 1...Rxd5
        • 2.Rxd5#
      • 1...Bxd3!
    • 1.Rb6?
      • threat
        • 2.Re6#
      • 1...Qxf5
        • 2.c4#
      • 1...Qxd5
        • 2.Sg6#
      • 1...Qa6
        • 2.Sg6#
      • 1...e6
        • 2.Rxe6#
      • 1...Rd6!
    • 1.c4?
      • threat
        • 2.Sg6#
      • 1...Qxf5
        • 2.Rb6#
      • 1...Qxd5
        • 2.Rb5#
      • 1...Rxd5!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Sg6#
      • 1...Qxf5
        • 2.d6#
      • 1...Qxd5
        • 2.c4#
      • 1...Rxd5
        • 2.b8Q#
        • 2.b8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(b);::S(H)
    • Q(b);XP(D)::S(H)
    • Q(b);OGATE::P(D),XQ(b)
  • Tries
    • Try
      • R(B);XQ(b)
      • Threat
        • S(H)
      • Vars
        • R(g);OGATE,XP(I)::R1(B),XR(g)
      • Refutation
        • B(a);XR(B)
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • Q(b);N_GUARD,XS(J)::B(A)+P(D)
        • Q(b);XP(I)::S(H)
        • Q(b);::S(H)
        • P(f);::R1(C),XP(f)
      • Refutation
        • R(g);
    • Try
      • P(D);
      • Threat
        • S(H)
      • Vars
        • Q(b);N_GUARD,XS(J)::B(A)+R(C)
        • Q(b);N_GUARD,XP(I)::B(A)+R(C)
      • Refutation
        • R(g);XP(I)
  • Actual
    • R(C);
    • Threat
      • S(H)
    • Vars
      • Q(b);N_GUARD,XS(J)::R(C)+P(I)
      • Q(b);N_GUARD,P_SPINQ(b),XP(I)::B(A)+P(D)
      • R(g);N_GUARD,P_SPINR(g),XP(I)::P=Q
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