MESON Chess Problem Database

Problem Display
PID: 84905 (7b/4PR2/1K2N3/1R1PkB2/2PnNnP1/3p1P2/8/4B3 w - - 0 1)

Petite, Efren

Apprenti Sorcier, 1993

7b/4PR2/1K2N3/1R1PkB2/2PnNnP1/3p1P2/8/4B3

#2

12 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf5
      • 2.Rxf5#
    • 1...Sxd5+
      • 2.Rxd5#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Bxd4#
      • 1...Sxd5+
        • 2.Rxd5#
      • 1...Se2
        • 2.d6#
      • 1...Sxe6!
    • 1.Bg3?
      • threat
        • 2.Bxf4#
      • 1...Se2
        • 2.d6#
      • 1...Sxe6!
    • 1.d6+?
      • 1...Sd5+
        • 2.Rxd5#
      • 1...Sxb5!
  • Keys
    • 1.e8Q!
      • threat
        • 2.Qb8#
        • 2.Qxh8#
      • 1...Sxd5+
        • 2.Rxd5#
      • 1...Sxb5
        • 2.Qxh8#
      • 1...Sxf5
        • 2.Rxf5#
      • 1...Sdxe6
        • 2.Bc3#
      • 1...Sfxe6
        • 2.Bg3#
      • 1...Bf6
        • 2.Qb8#
      • 1...Bg7
        • 2.Qb8#
      • 1...Sc6
        • 2.Qxh8#
      • 1...Sh5
        • 2.Qb8#
      • 1...Sg6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE,XB(H)::R1(L),XS(b)
    • S(c);CHECK,OGATE,P_SPINS(c),XP(G)::R1(F),XS(c)
  • Tries
    • Try
      • B(A);P_PINS(b)
      • Threat
        • B(A),XS(b)
      • Vars
        • S(c);CHECK,OGATE,XP(G)::R1(F),XS(c)
        • S(c);N_GUARD::R(F)+P(G)
      • Refutation
        • S(c);XS(J)
    • Try
      • B(A);P_PINS(c)
      • Threat
        • B(A),XS(c)
      • Vars
        • S(b);N_GUARD::R(F)+P(G)
      • Refutation
        • S(b);XS(J)
    • Try
      • P(G);CHECK
      • Vars
        • S(c);CHECK,N_GUARD,P_SPINS(c)::R1(F),XS(c)
      • Refutation
        • S(b);XR(F)
  • Actual
    • P(K);
    • Threat
      • DUALS(2)
    • Vars
      • S(c);CHECK,OGATE,P_SPINS(c),XP(G)::R1(F),XS(c)
      • S(b);XR(F)::QAB(K),XB(e)
      • S(b);OGATE,XB(H)::R1(L),XS(b)
      • S(b);OGATEB,P_SPINS(b),XS(J)::B(A)
      • S(c);OGATEB,P_SPINS(c),XS(J)::B(A)
      • B(e);::QAB(K)
      • S(b);::QAB(K),XB(e)
      • S(c);::QAB(K)
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