MESON Chess Problem Database

Problem Display
PID: 67130 (n2B1n2/2pBr1p1/2R1NkP1/2P3pP/1p2K1P1/2r1pN2/1Q6/8 w - - 0 1)

Avner, Uri

3rd Place, Messigny, 1997

n2B1n2/2pBr1p1/2R1NkP1/2P3pP/1p2K1P1/2r1pN2/1Q6/8

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe6
      • 2.Rxe6#
    • 1...b3
      • 2.Qxc3#
  • Tries
    • 1.Kd5?
      • threat
        • 2.Sxf8#
      • 1...Sxe6
        • 2.Rxe6#
      • 1...Sxg6
        • 2.Sexg5#
      • 1...Sxd7
        • 2.Sed4#
        • 2.Sf4#
        • 2.Sexg5#
        • 2.Sxc7#
        • 2.Sf8#
      • 1...Sh7
        • 2.Sed4#
        • 2.Sf4#
        • 2.Sexg5#
        • 2.Sxc7#
        • 2.Sf8#
      • 1...Sb6+!
    • 1.Se5?
      • threat
        • 2.Sxf8#
      • 1...Rc4+
        • 2.Sxc4#
      • 1...Sxe6
        • 2.Rxe6#
      • 1...Sxg6
        • 2.Sd4#
        • 2.Sf4#
        • 2.Sxc7#
        • 2.Sf8#
      • 1...Sxd7
        • 2.Sxd7#
        • 2.Sd4#
        • 2.Sf4#
        • 2.Sxc7#
        • 2.Sf8#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Sh7
        • 2.Sd4#
        • 2.Sf4#
        • 2.Sxc7#
        • 2.Sf8#
      • 1...Rxc5!
  • Keys
    • 1.Kd4!
      • threat
        • 2.Sxf8#
      • 1...Rd3+
        • 2.Kxd3#
      • 1...Rc4+
        • 2.Kxc4#
      • 1...Sxe6+
        • 2.Rxe6#
      • 1...Rxc5
        • 2.Kxc5#
      • 1...Sxg6
        • 2.Sexg5#
      • 1...Sxd7
        • 2.Sf4#
        • 2.Sexg5#
        • 2.Sxc7#
        • 2.Sf8#
      • 1...Sh7
        • 2.Sf4#
        • 2.Sexg5#
        • 2.Sxc7#
        • 2.Sf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(j);OGATE,P_SPINS(j),XS(H)::R1(G),XS(j)
    • P(c);N_GUARD::QAB(A),XR(a)
  • Tries
    • Try
      • K(C);N_SPINS(H),S_FLIGHT
      • Threat
        • R(G)+S(H),XS(j)
      • Vars
        • S(j);OGATE,P_SPINS(j),XS(H)::R1(G),XS(j)
        • S(j);N_GUARD,XP(I)::R(G)+S(H),XP(d)
      • Refutation
        • S(i);CHECK
    • Try
      • S(B);N_PINR(a),N_SPINS(H),P_PINR(g)
      • Threat
        • R(G)+S(H),XS(j)
      • Vars
        • R(a);CHECK::QAB(A)+S(B),XR(a)
        • S(j);OGATE,P_SPINS(j),XS(H)::R1(G),XS(j)
        • R(a);::QAB(A)+S(B),XR(a)
      • Refutation
        • R(a);XP(E)
  • Actual
    • K(C);N_PINR(a),N_SPINS(H),P-FLIGHT,P_PINR(g)
    • Threat
      • R(G)+S(H),XS(j)
    • Vars
      • R(a);CHECK::QAB(A)+K(C),XR(a)
      • S(j);CHECK,OGATE,P_SPINS(j),XS(H)::R1(G),XS(j)
      • R(a);XP(E)::QAB(A)+K(C),XR(a)
      • S(j);N_GUARD,XP(I)::R(G)+S(H),XP(d)
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