MESON Chess Problem Database

Problem Display
PID: 102421 (4B3/2r1n3/pQrpk1p1/3Nb1B1/qn4P1/3pN3/p1b5/4R2K w - - 0 1)

Khalife, Georges

Europe Echecs, 1965

4B3/2r1n3/pQrpk1p1/3Nb1B1/qn4P1/3pN3/p1b5/4R2K

#2

8 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb6
      • 2.Sxc7#
  • Tries
    • 1.Qxc7?
      • threat
        • 2.Qd7#
        • 2.Qxe7#
      • 1...Rxc7
        • 2.Sxc7#
      • 1...Sbxd5
        • 2.Qd7#
      • 1...Sexd5
        • 2.Bf7#
        • 2.Qd7#
        • 2.Qf7#
      • 1...Ba1
        • 2.Qxe7#
      • 1...Bb2
        • 2.Qxe7#
      • 1...Bh2
        • 2.Qxe7#
      • 1...Bc3
        • 2.Qxe7#
      • 1...Bg3
        • 2.Qxe7#
      • 1...Bd4
        • 2.Qxe7#
      • 1...Bf4
        • 2.Qxe7#
      • 1...Bg7
        • 2.Qxe7#
      • 1...Bh8
        • 2.Qxe7#
      • 1...Rc3
        • 2.Qxe7#
      • 1...Rc4
        • 2.Qxe7#
      • 1...Rc5
        • 2.Qxe7#
      • 1...Rb6
        • 2.Qxe7#
      • 1...Sf5
        • 2.Bf7#
        • 2.Qd7#
        • 2.Qf7#
      • 1...Sc8
        • 2.Bf7#
        • 2.Qd7#
        • 2.Qf7#
      • 1...Sg8
        • 2.Bf7#
        • 2.Qd7#
        • 2.Qf7#
      • 1...Bf6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sf4#
      • 1...Kxd5
        • 2.Bf7#
      • 1...Sbxd5
        • 2.Sg7#
      • 1...Sexd5
        • 2.Sd4#
      • 1...Rc4
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(h);N_GUARD,XQ(G)::S(E),XR(l)
  • Tries
    • Try
      • Q(G);XR(l)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XQ(G)::S(E),XR(h)
        • S(e);XS(E)::QAB1(G)
        • B(f);::QAR1(G),XS(m)
        • R(h);::QAR1(G),XS(m)
      • Refutation
        • B(f);
  • Actual
    • S(C);P_PINB(f)
    • Threat
      • S(E)
    • Vars
      • K(j);N_SPINB(f),S_FLIGHT,XS(E)::B(H)
      • S(e);SBLOCK,XS(E)::S(C)
      • S(m);SBLOCK,XS(E)::S(C)
      • R(h);OGATE,P_SPINP(i)::QAR1(G),XP(i)
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