MESON Chess Problem Database

Problem Display
PID: 211171 (4n3/2pp1N1K/6R1/b3Pk2/4p1p1/6P1/2R2P2/1BB1r2b w - - 0 1)

Cheylan, Yves

The Problemist, 1985

4n3/2pp1N1K/6R1/b3Pk2/4p1p1/6P1/2R2P2/1BB1r2b

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Rf6#
    • 1...Sf6+
      • 2.Rxf6#
    • 1...Sg7
      • 2.Rf6#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Sh6#
      • 1...Sf6+
        • 2.Rxf6#
      • 1...e3!
    • 1.Rc5?
      • threat
        • 2.Sh6#
      • 1...Sf6+
        • 2.Rxf6#
      • 1...d5
        • 2.exd5 ep#
      • 1...Bd2!
    • 1.f3?
      • threat
        • 2.fxg4#
      • 1...Sf6+
        • 2.Rxf6#
      • 1...exf3
        • 2.Re2#
      • 1...gxf3
        • 2.g4#
      • 1...e3
        • 2.Ra2#
        • 2.Rb2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Rc3#
        • 2.Rc4#
        • 2.Rc5#
        • 2.Rcc6#
        • 2.Rxc7#
      • 1...Bxf3!
  • Keys
    • 1.f4!
      • threat
        • 2.Sh6#
      • 1...Sf6+
        • 2.Rxf6#
      • 1...exf4 ep
        • 2.Re2#
      • 1...gxf4 ep
        • 2.g4#
      • 1...e3
        • 2.Rg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(i);N_GUARD::R1(G)
    • S(i);CHECK,N_GUARD::R1(G),XS(i)
  • Tries
    • Try
      • B(B);
      • Threat
        • S(H)
      • Vars
        • S(i);CHECK,N_GUARD::R1(G),XS(i)
      • Refutation
        • P(c);
    • Try
      • R(C);P_PINP(c)
      • Threat
        • S(H)
      • Vars
        • S(i);CHECK,N_GUARD::R1(G),XS(i)
        • P(h);OGATE::R(C)+P(F),XP(h),EP
      • Refutation
        • B(e);
    • Try
      • P(D);
      • Threat
        • P(D),XP(d)
      • Vars
        • S(i);CHECK,N_GUARD::R1(G),XS(i)
        • P(c);OGATEB,XP(D)::B(A)+R(C)
        • P(d);OGATE,XP(D)::P(E)
      • Refutation
        • B(b);XP(D)
  • Actual
    • P(D);
    • Threat
      • S(H)
    • Vars
      • S(i);CHECK,N_GUARD::R1(G),XS(i)
      • P(c);EP,OGATEB,XP(D)::B(A)+R(C)
      • P(d);EP,OGATE,XP(D)::P(E)
      • P(c);OGATEB::B(A)+R(C)
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