MESON Chess Problem Database

Problem Display
PID: 54817 (7B/2P1r1R1/BKn4R/4NP2/b1Pk1b2/3Np2p/1P6/1nQ4r w - - 0 1)

Anonymous

Source?, 0000

7B/2P1r1R1/BKn4R/4NP2/b1Pk1b2/3Np2p/1P6/1nQ4r

#2

12 + 9

1099 WCSC 1978
5396 World Chess Solving Championship 1977-1996 1997

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qxf4#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Sf3#
      • 1...Kxe5
        • 2.Rf7#
      • 1...Rxe5
        • 2.Rd7#
      • 1...Bxe5
        • 2.Rg4#
      • 1...Sxe5
        • 2.Rd6#
      • 1...Bd1
        • 2.Sxc6#
      • 1...Sd2
        • 2.Qc3#
      • 1...Rf1!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Sf3#
      • 1...Kxe5
        • 2.Rf7#
      • 1...Rxe5
        • 2.Rd7#
      • 1...Bxe5
        • 2.Rg4#
      • 1...Sxe5
        • 2.Rd6#
      • 1...exf2
        • 2.Qxf4#
      • 1...Bd1
        • 2.Sxc6#
      • 1...Sd2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATE::QAR2(A),XB(g)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(E)
      • Vars
        • K(f);OGATEB,S_FLIGHT,XS(E)::B(L)+R(K)
        • R(i);OGATE,XS(E)::R(K)
        • B(g);OGATEB,XS(E)::R(K)
        • S(h);SBLOCK,XS(E)::R(I)
        • B(e);N_GUARD::S(E),XS(h)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • R(b);
  • Actual
    • S(C);
    • Threat
      • S(E)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XS(E)::B(L)+R(K)
      • R(i);OGATE,XS(E)::R(K)
      • B(g);OGATEB,XS(E)::R(K)
      • S(h);SBLOCK,XS(E)::R(I)
      • P(c);OGATE,XS(C)::QAR2(A),XB(g)
      • B(e);N_GUARD::S(E),XS(h)
      • S(a);N_GUARD::QAB1(A)
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