MESON Chess Problem Database

Problem Display
PID: 84792 (nbQR1R2/1p2p1Bp/b3P1kP/r7/2r2pPK/3N4/8/7B w - - 0 1)

Petite, Efren

Europe Echecs, 1978

nbQR1R2/1p2p1Bp/b3P1kP/r7/2r2pPK/3N4/8/7B

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Sxf4#
    • 1...Rf5
      • 2.gxf5#
    • 1...Rh5+
      • 2.gxh5#
  • Tries
    • 1.Be4+?
      • 1...Rf5
        • 2.Bxf5#
        • 2.gxf5#
      • 1...Rxe4!
    • 1.Rd4?
      • threat
        • 2.Qe8#
      • 1...Rh5+
        • 2.gxh5#
      • 1...Rf5
        • 2.gxf5#
      • 1...Bb5
        • 2.Be4#
      • 1...Sc7
        • 2.Sxf4#
      • 1...Rxc8!
    • 1.Rd6?
      • threat
        • 2.Qe8#
      • 1...Rh5+
        • 2.gxh5#
      • 1...Rxc8
        • 2.Sxf4#
      • 1...Rf5
        • 2.gxf5#
      • 1...Bb5
        • 2.Se5#
      • 1...Sc7!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Qe8#
      • 1...Rxc8
        • 2.Be4#
      • 1...Bb5
        • 2.Rg5#
      • 1...Sc7
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD,S_CUTB(j)::S(B),XP(b)
    • R(c);OGATE::P(C),XR(c)
    • R(c);CHECK,OGATE::P(C),XR(c)
  • Tries
    • Try
      • B(A);CHECK
      • Refutation
        • R(a);XB(A)
    • Try
      • R(I);
      • Threat
        • QAB(H)
      • Vars
        • R(c);CHECK,OGATE::P(C),XR(c)
        • R(c);OGATE::P(C),XR(c)
        • B(d);S_CUTR(c)::B(A)
        • S(i);S_CUTB(j)::S(B),XP(b)
      • Refutation
        • R(a);XQ(H)
    • Try
      • R(I);
      • Threat
        • QAB(H)
      • Vars
        • R(c);CHECK,OGATE::P(C),XR(c)
        • R(a);N_GUARD,XQ(H)::S(B),XP(b)
        • R(c);OGATE::P(C),XR(c)
        • B(d);S_CUTR(c)::S(B)
      • Refutation
        • S(i);
  • Actual
    • R(I);
    • Threat
      • QAB(H)
    • Vars
      • R(a);N_GUARD,XQ(H)::B(A)
      • B(d);S_CUTR(c)::R1(I)
      • S(i);S_CUTB(j)::S(B)
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