MESON Chess Problem Database

Problem Display
PID: 271050 (QB2R3/4n2B/2P1Pp2/1N1k1np1/1p4p1/1P4p1/3KN1P1/2R5 w - - 0 1)

Bouma, Gerhard Johan

2nd Comm., Schakend Nederland, 1984

QB2R3/4n2B/2P1Pp2/1N1k1np1/1p4p1/1P4p1/3KN1P1/2R5

#2

12 + 8

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Bg8#
    • 1...Sxc6
      • 2.Qxc6#
  • Tries
    • 1.Sec3+?
      • 1...Kc5
        • 2.Ba7#
      • 1...Kxe6
        • 2.Bg8#
      • 1...bxc3+!
    • 1.Sf4+?
      • 1...Ke4
        • 2.Re1#
        • 2.Rc4#
      • 1...gxf4!
    • 1.Rc5+?
      • 1...Ke4
        • 2.Sxg3#
        • 2.Sd6#
      • 1...Kxe6
        • 2.Bg8#
      • 1...Kxc5!
  • Keys
    • 1.Qa5!
      • 1...Ke4
        • 2.Sd6#
      • 1...Kxe6
        • 2.Bg8#
      • 1...Sxc6
        • 2.Sbc3#
      • 1...Se3
        • 2.Sbd4#
      • 1...Sd4
        • 2.Sbxd4#
      • 1...Sh4
        • 2.Sbd4#
      • 1...Sd6
        • 2.Sc7#
      • 1...Sh6
        • 2.Sbd4#
      • 1...Sg7
        • 2.Sbd4#
      • 1...Sg6
        • 2.Sd6#
      • 1...Sc8
        • 2.Sd6#
      • 1...Sg8
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,P_SPINS(h),S_FLIGHT,XP(H)::B(I)
    • S(h);OGATE,P_SPINS(h),XP(G)::QAB1(J),XS(h)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT,S_CUTP(b)::B(K)
        • K(d);N_GUARD,P_SPINS(h),S_CUTP(b),S_FLIGHT,XP(H)::B(I)
      • Refutation
        • P(b);CHECK,XS(C)
    • Try
      • S(C);CHECK
      • Refutation
        • P(f);XS(C)
    • Try
      • R(A);CHECK
      • Vars
        • K(d);N_GUARD,P_SPINS(h),S_FLIGHT,XP(H)::B(I)
      • Refutation
        • K(d);P-FLIGHT,XR(A)
  • Actual
    • Q(J);
    • Vars
      • K(d);N_GUARD,P_SPINS(e),S_FLIGHT::S(F)
      • K(d);OGATEB,P_SPINS(h),S_FLIGHT,XP(H)::B(I)
      • S(h);SBLOCK,XP(G)::QAR(J)+S(F),DCHECK
      • S(e);::QAR(J)+S(F)
      • S(e);::QAR(J)+S(F),XS(e)
      • S(e);SBLOCK::QAR(J)+S(F),DCHECK
      • S(h);::QAR(J)+S(F)
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