MESON Chess Problem Database

Problem Display
PID: 159147 (r3RKB1/3pNP2/4kP1R/3b4/7N/b1Q5/3P4/2B5 w - - 0 1)

Ahs, Carl Johan Mathias

Arbejder-Skak, 1933

r3RKB1/3pNP2/4kP1R/3b4/7N/b1Q5/3P4/2B5

#2

11 + 5

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Sef5#
    • 1...Rxe8+
      • 2.fxe8S#
    • 1...Bxc1
      • 2.Sc8#
    • 1...Bb2
      • 2.Sc8#
    • 1...Bxe7+
      • 2.fxe7#
  • Keys
    • 1.Bb2!
      • threat
        • 2.Qe5#
      • 1...Rxe8+
        • 2.fxe8S#
      • 1...Bxe7+
        • 2.fxe7#
      • 1...Kd6
        • 2.Sef5#
      • 1...Bxb2
        • 2.Sc8#
      • 1...Bd6
        • 2.Qh3#
      • 1...d6
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);N_PINS(G),P-FLIGHT::S(G)
    • R(e);CHECK,OGATE,XR(I)::PXR(e)=S
    • B(a);N_PINS(G),XB(A)::R(I)+S(G)
    • B(a);N_PINS(G)::R(I)+S(G)
    • B(a);CHECK,OGATE,P_SPINB(a),XS(G)::R(F)+P(E),XB(a)
  • Actual
    • B(A);
    • Threat
      • QAR1(C)
    • Vars
      • R(e);CHECK,OGATE,XR(I)::PXR(e)=S
      • B(a);CHECK,OGATE,P_SPINB(a),XS(G)::R(F)+P(E),XB(a)
      • K(c);N_PINS(G),P-FLIGHT::S(G)
      • B(a);N_PINS(G),XB(A)::R(I)+S(G)
      • B(a);SBLOCK::QAB(C)
      • P(d);N_PINS(G),SBLOCK::QAB(C)
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