MESON Chess Problem Database

Problem Display
PID: 148144 (B7/1R3Pn1/1N4K1/6p1/1pb1kPN1/8/2P3P1/6B1 w - - 0 1)

Jacobs, Herbert

Source?, 0000

B7/1R3Pn1/1N4K1/6p1/1pb1kPN1/8/2P3P1/6B1

#2

10 + 5

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf7+
      • 2.Rxf7#
    • 1...gxf4
      • 2.Re7#
  • Tries
    • 1.Kxg5?
      • threat
        • 2.Sf6#
        • 2.Re7#
      • 1...Bd5
        • 2.Sf6#
      • 1...Sh5
        • 2.Re7#
      • 1...Se8
        • 2.Re7#
      • 1...Se6+!
    • 1.Rc7+?
      • 1...Bd5
        • 2.Rc4#
      • 1...Kxf4!
    • 1.f8Q?
      • threat
        • 2.Re7#
      • 1...Bf7+
        • 2.Rxf7#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Se6
        • 2.Qf5#
      • 1...Bd5!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sgf6#
      • 1...Kxd5
        • 2.Rb6#
      • 1...Bxd5
        • 2.Rxb4#
      • 1...gxf4
        • 2.Sdf6#
      • 1...Sh5
        • 2.Re7#
      • 1...Se8
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(b);CHECK,OGATE,XP(I)::B(J)+R(H),XB(b)
    • P(d);SBLOCK,XP(D)::B(J)+R(H),DCHECK
  • Tries
    • Try
      • K(G);P-FLIGHT,XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::S(E)
        • S(e);::B(J)+R(H),DCHECK
      • Refutation
        • S(e);CHECK
    • Try
      • R(H);CHECK
      • Vars
        • B(b);P_SPINB(b)::R(H)
      • Refutation
        • K(c);P-FLIGHT,XP(D)
    • Try
      • P(I);
      • Threat
        • B(J)+R(H),DCHECK
      • Vars
        • B(b);CHECK,N_GUARD::B(J)+R(H),XB(b)
        • S(e);N_GUARD::QAB1(I),XS(e)
        • S(e);N_GUARD::QAB1(I)
      • Refutation
        • B(b);
  • Actual
    • S(F);
    • Threat
      • S(E)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(F)::B(J)+R(H)
      • B(b);OGATEB,XS(F)::R(H),XP(a)
      • P(d);SBLOCK,XP(D)::S(F)
      • S(e);N_GUARD::R(H)
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