MESON Chess Problem Database

Problem Display
PID: 259466 (8/3ppr2/1pR1B3/1pPnPp2/1PkBRpN1/4P3/PpN1PK2/8 w - - 0 1)

Cheylan, Yves

3rd Prize, diagrammes, 1987

8/3ppr2/1pR1B3/1pPnPp2/1PkBRpN1/4P3/PpN1PK2/8

#2

13 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...fxe3+
      • 2.Sgxe3#
    • 1...fxg4
      • 2.Bxb2#
    • 1...bxc5
      • 2.Rxc5#
    • 1...dxe6
      • 2.cxb6#
    • 1...d6
      • 2.cxb6#
      • 2.cxd6#
  • Tries
    • 1.Rxf4?
      • threat
        • 2.Bxb2#
      • 1...dxe6
        • 2.cxb6#
      • 1...b1Q
        • 2.Ba1#
        • 2.Bb2#
      • 1...b1S
        • 2.Ba1#
        • 2.Bb2#
      • 1...b1B
        • 2.Ba1#
        • 2.Bb2#
      • 1...b1R
        • 2.Ba1#
        • 2.Bb2#
      • 1...fxg4!
    • 1.Rc7?
      • threat
        • 2.cxb6#
      • 1...fxe3+
        • 2.Sgxe3#
      • 1...bxc5
        • 2.Rxc5#
      • 1...dxe6!
  • Keys
    • 1.exf4!
      • threat
        • 2.Sge3#
      • 1...fxg4
        • 2.Bxb2#
      • 1...dxe6
        • 2.cxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • P(c);CHECK,XP(E)::S(I),XP(c)
    • P(f);N_GUARD,XS(I)::R(H)+B(G),XP(a)
    • P(g);OGATE,P_SPINP(g),XP(J)::R1(L),XP(g)
    • P(h);N_GUARD,N_SPINS(e),XB(M)::R(L)+P(J),XP(g)
  • Tries
    • Try
      • R(H);XP(c)
      • Threat
        • R(H)+B(G),XP(a)
      • Vars
        • P(h);N_GUARD,N_SPINS(e),XB(M)::R(L)+P(J),XP(g)
      • Refutation
        • P(f);P_PINR(H),XS(I)
    • Try
      • R(L);
      • Threat
        • R(L)+P(J),XP(g)
      • Vars
        • P(c);CHECK,XP(E)::S(I),XP(c)
        • P(g);OGATE,P_SPINP(g),XP(J)::R1(L),XP(g)
      • Refutation
        • P(h);N_SPINS(e),XB(M)
  • Actual
    • P(E);XP(c)
    • Threat
      • S(I)
    • Vars
      • P(f);N_GUARD,P_PINP(E),XS(I)::R(H)+B(G),XP(a)
      • P(h);N_GUARD,N_SPINS(e),XB(M)::R(L)+P(J),XP(g)
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