MESON Chess Problem Database

Problem Display
PID: 186687 (1r3n1b/8/1p2P3/1P1kP1Q1/8/1P5B/1BRN3K/2q1R1rn w - - 0 1)

Petkov, Petko Andonov

Chess, 1960

1r3n1b/8/1p2P3/1P1kP1Q1/8/1P5B/1BRN3K/2q1R1rn

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd2+
      • 2.Qxd2#
    • 1...Rg2+
      • 2.Qxg2#
    • 1...Bxe5+
      • 2.Qxe5#
  • Tries
    • 1.Qd8+?
      • 1...Sd7
        • 2.Qxd7#
      • 1...Rxd8!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qd6#
      • 1...Qxd2+
        • 2.Rxd2#
      • 1...Rg2+
        • 2.Bxg2#
      • 1...Bxe5+
        • 2.Rxe5#
      • 1...Rd8
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE,XS(D)::QAR(J),XQ(a)
    • R(b);CHECK,N_GUARD::QAB(J),XR(b)
    • B(h);CHECK,OGATE,P_SPINB(h),XP(I)::QAR1(J),XB(h)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR2(J),XS(g)
      • Refutation
        • R(f);XQ(J)
  • Actual
    • Q(J);
    • Threat
      • QAR1(J)
    • Vars
      • Q(a);CHECK,OGATE,XS(D)::R(C),XQ(a)
      • R(b);CHECK,N_GUARD::B(G),XR(b)
      • B(h);CHECK,OGATE,XP(I)::R1(A),XB(h)
      • R(f);N_GUARD::QAB(J)
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