MESON Chess Problem Database

Problem Display
PID: 249946 (b5R1/3B4/3p2PB/3R2qk/8/7K/8/7Q w - - 0 1)

Ahlheim, Karl-Heinz

Stella Polaris, 1969

b5R1/3B4/3p2PB/3R2qk/8/7K/8/7Q

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Kg2#
    • 1...Qf5+
      • 2.Kg3#
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qxg5#
      • 1...Qf5+
        • 2.Rxf5#
      • 1...Kxh6
        • 2.Qxg5#
      • 1...Qxd5
        • 2.Bg4#
      • 1...Qe5
        • 2.Bg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);::QAR(A)+K(B)
    • Q(a);CHECK::QAR(A)+K(B)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XQ(a)
    • Vars
      • Q(a);CHECK,OGATEB::R(C),XQ(a)
      • K(b);P-FLIGHT,XB(E)::QAB1(A),XQ(a)
      • Q(a);N_SPINQ(a),XR(C)::B(F)
      • Q(a);::B(F)
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