MESON Chess Problem Database

Problem Display
PID: 188458 (1r1r1b2/1pPPkP2/7p/3Q3B/4P1P1/5P1b/3B4/2RK4 w - - 0 1)

Ahlheim, Karl-Heinz

Schweizerische Schachzeitung, 1969

1r1r1b2/1pPPkP2/7p/3Q3B/4P1P1/5P1b/3B4/2RK4

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7
      • 2.Qe5#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Qd6#
      • 1...Kf6
        • 2.Qe5#
      • 1...Rxd7!
    • 1.Rc6?
      • threat
        • 2.Bb4#
        • 2.Re6#
        • 2.Qe6#
        • 2.Qd6#
      • 1...Rxd7
        • 2.Re6#
        • 2.Qe6#
        • 2.Qe5#
      • 1...Bxg4
        • 2.Bb4#
        • 2.Qd6#
      • 1...Bg7
        • 2.Bb4#
        • 2.Qd6#
      • 1...bxc6!
    • 1.g5?
      • threat
        • 2.Bb4#
      • 1...hxg5
        • 2.Bxg5#
      • 1...Rxd7!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Bb4#
      • 1...Kd6
        • 2.Bb4#
      • 1...Rxd7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK,XP(J)::QAR2(G)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAB1(G)
      • Vars
        • K(d);S_FLIGHT::QAB1(G)
      • Refutation
        • R(f);P_PINQ(G),XP(J)
    • Try
      • R(A);
      • Threat
        • DUALS(4)
      • Refutation
        • P(c);XR(A)
    • Try
      • P(F);
      • Threat
        • B(C)
      • Vars
        • P(b);OGATE,XP(F)::B(C),XP(b)
      • Refutation
        • R(f);XP(J)
  • Actual
    • Q(G);
    • Threat
      • B(C)
    • Vars
      • K(d);S_FLIGHT::B(C)
      • R(f);P_PINB(C),SBLOCK,XP(J)::QAR2(G)
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