MESON Chess Problem Database

Problem Display
PID: 268030 (1KB5/3bB3/1R2PP2/QN1pk1nr/3pP1P1/2P3P1/3n1R2/b2rN3 w - - 0 1)

Petite, Efren

The Problemist, 1999

1KB5/3bB3/1R2PP2/QN1pk1nr/3pP1P1/2P3P1/3n1R2/b2rN3

#2

14 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Re2#
    • 1...Sdxe4
      • 2.Rf5#
    • 1...Sgxe4
      • 2.Sd3#
    • 1...dxe4
      • 2.Rf5#
  • Tries
    • 1.Bd6+?
      • 1...Kxe4
        • 2.Re2#
      • 1...Kxe6!
    • 1.cxd4+?
      • 1...Kxe4
        • 2.Re2#
      • 1...Bxd4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qxd5#
      • 1...Kxe6
        • 2.Qxd5#
      • 1...Bxe6
        • 2.Sd3#
      • 1...Sdxe4
        • 2.Sc4#
      • 1...Sgxe4
        • 2.Sf7#
      • 1...Bb5
        • 2.Rf5#
      • 1...Bc6
        • 2.Sd3#
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(f);OGATEB,P-FLIGHT,XP(E)::R(B)
    • S(c);SBLOCK,XP(E)::R1(B)
    • S(g);SBLOCK,XP(E)::S(A)
    • P(e);SBLOCK,XP(E)::R1(B)
  • Tries
    • Try
      • B(L);CHECK
      • Vars
        • K(f);N_GUARD,P-FLIGHT,XP(E)::R(B)
      • Refutation
        • K(f);P-FLIGHT,P_SPINB(i),XP(J)
    • Try
      • P(C);CHECK,XP(d)
      • Vars
        • K(f);P-FLIGHT,S_CUTB(a),XP(E)::R(B)
      • Refutation
        • B(a);XP(C)
  • Actual
    • S(H);P_PINP(e)
    • Threat
      • QAR1(G),XP(e)
    • Vars
      • K(f);N_SPINP(e),P-FLIGHT,P_SPINB(i),XP(J)::QAB1(G),XP(e)
      • B(i);XP(J)::S(A)
      • S(c);N_GUARD,SBLOCK,XP(E)::S(H)
      • S(g);N_GUARD,SBLOCK,XP(E)::S(H)
      • B(i);N_SPINP(e)::R1(B)
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