MESON Chess Problem Database

Problem Display
PID: 162421 (8/b4r1q/8/4B2p/Kp6/3PkP2/Q3B1R1/4r3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Sakkelet, 1995

8/b4r1q/8/4B2p/Kp6/3PkP2/Q3B1R1/4r3

#2

7 + 7

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Qxe2#
  • Tries
    • 1.Bf1?
      • threat
        • 2.Qf2#
      • 1...Kxf3
        • 2.Rg3#
      • 1...Rxf1
        • 2.Qe2#
      • 1...Rxf3
        • 2.Qd2#
      • 1...Re2
        • 2.Qxe2#
      • 1...Ra1!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Qd2#
      • 1...Kxd3
        • 2.Qb3#
      • 1...Qxd3
        • 2.Qf2#
      • 1...Rxd1
        • 2.Qe2#
      • 1...Re2
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XB(B)::QAR1(A),XR(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(E)::R1(C)
        • R(a);N_GUARD,XB(B)::QAR1(A)
        • R(f);SBLOCK,XP(E)::QAB1(A)
        • R(a);N_GUARD::QAR1(A),XR(a)
      • Refutation
        • R(a);P_PINQ(A)
  • Actual
    • B(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(D)::QAR2(A)
      • Q(g);SBLOCK,XP(D)::QAB1(A)
      • R(a);N_GUARD,XB(B)::QAR1(A)
      • R(a);N_GUARD::QAR1(A),XR(a)
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