MESON Chess Problem Database

Problem Display
PID: 87865 (4B1R1/1p5p/1PN2ppP/2p2P1N/8/3P1k2/6R1/2B2K1n w - - 0 1)

Turke, SE

The Problemist, 1975

4B1R1/1p5p/1PN2ppP/2p2P1N/8/3P1k2/6R1/2B2K1n

#2

11 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Rg3#
    • 1...Sg3+
      • 2.Rxg3#
    • 1...c4
      • 2.Sd4#
    • 1...gxh5
      • 2.Bxh5#
    • 1...bxc6
      • 2.Bxc6#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Se5#
      • 1...bxc6
        • 2.Bxc6#
      • 1...Sg3+!
    • 1.Bf7?
      • threat
        • 2.Bd5#
      • 1...Sg3+
        • 2.Rxg3#
      • 1...Sf2
        • 2.Rg3#
      • 1...bxc6!
    • 1.R2xg6?
      • 1...Sg3+
        • 2.Rxg3#
      • 1...bxc6
        • 2.Bxc6#
      • 1...c4
        • 2.Sd4#
      • 1...Sf2
        • 2.Rg3#
      • 1...hxg6!
    • 1.R8xg6?
      • 1...Sg3+
        • 2.R2xg3#
        • 2.R6xg3#
      • 1...bxc6
        • 2.Bxc6#
      • 1...c4
        • 2.Sd4#
      • 1...Sf2
        • 2.Rxf2#
        • 2.R2g3#
        • 2.R6g3#
      • 1...hxg6!
    • 1.fxg6?
      • 1...Sg3+
        • 2.Rxg3#
      • 1...bxc6
        • 2.Bxc6#
      • 1...Sf2
        • 2.Rg3#
      • 1...c4
        • 2.Sd4#
      • 1...f5
        • 2.Se5#
      • 1...hxg6!
  • Keys
    • 1.Rg5!
      • 1...Sg3+
        • 2.Rxg3#
      • 1...fxg5
        • 2.Se5#
      • 1...gxf5
        • 2.Rxf5#
      • 1...gxh5
        • 2.Bxh5#
      • 1...bxc6
        • 2.Bxc6#
      • 1...c4
        • 2.Sd4#
      • 1...Sf2
        • 2.Rg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::R1(C)
    • S(a);CHECK,N_GUARD::R1(C),XS(a)
    • P(c);N_GUARD::S(H)
    • P(e);OGATE,XS(F)::B(J),XP(e)
    • P(f);OGATE,XS(H)::B(J),XP(f)
  • Tries
    • Try
      • S(F);XP(d)
      • Threat
        • S(H)
      • Vars
        • P(f);OGATE,XS(H)::B(J),XP(f)
      • Refutation
        • S(a);CHECK
    • Try
      • B(J);
      • Threat
        • B(J)
      • Vars
        • S(a);CHECK,N_GUARD::R1(C),XS(a)
        • S(a);N_GUARD::R1(C)
      • Refutation
        • P(f);XS(H)
    • Try
      • R(C);XP(e)
      • Vars
        • S(a);CHECK,N_GUARD::R1(C),XS(a)
        • P(f);OGATE,XS(H)::B(J),XP(f)
        • P(c);N_GUARD::S(H)
        • S(a);N_GUARD::R1(C)
      • Refutation
        • P(g);XR(C)
    • Try
      • R(K);XP(e)
      • Vars
        • P(f);OGATE,XS(H)::B(J),XP(f)
        • P(c);N_GUARD::S(H)
      • Refutation
        • P(g);XR(K)
    • Try
      • P(E);XP(e)
      • Vars
        • S(a);CHECK,N_GUARD::R1(C),XS(a)
        • P(f);OGATE,XS(H)::B(J),XP(f)
        • S(a);N_GUARD::R1(C)
        • P(c);N_GUARD::S(H)
        • P(d);N_GUARD::S(H)
      • Refutation
        • P(g);XP(E)
  • Actual
    • R(C);
    • Vars
      • S(a);CHECK,N_GUARD::R1(C),XS(a)
      • P(d);N_GUARD,XR(C)::S(H)
      • P(e);OGATE,XP(E)::R(C),XP(e)
      • P(e);OGATE,XS(F)::B(J),XP(e)
      • P(f);OGATE,XS(H)::B(J),XP(f)
      • P(c);N_GUARD::S(H)
      • S(a);N_GUARD::R1(C)
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