MESON Chess Problem Database

Problem Display
PID: 238919 (2B2r2/1QN5/3n4/qn1p1R2/3Bk3/R6P/b2rPP1K/2b5 w - - 0 1)

Petite, Efren

Szachy, 1973

2B2r2/1QN5/3n4/qn1p1R2/3Bk3/R6P/b2rPP1K/2b5

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.f3#
    • 1...Bb1
      • 2.Qxd5#
    • 1...Sxd4
      • 2.Re3#
    • 1...Sc4
      • 2.Qxd5#
  • Tries
    • 1.Re5+?
      • 1...Kf4
        • 2.Se6#
        • 2.Rf3#
      • 1...Kxd4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Re5#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Rxd4
        • 2.Sc5#
      • 1...Rxf5
        • 2.Re3#
      • 1...Sxd4
        • 2.Sg5#
      • 1...Sxf5
        • 2.f3#
      • 1...Sc4
        • 2.Qxd5#
      • 1...Sf7
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(c);SBLOCK,XB(F)::P(B)
    • B(b);N_GUARD::QAB1(H),XP(g)
    • S(f);SBLOCK,XB(F)::R1(D)
    • S(h);S_CUTB(b)::QAB1(H),XP(g)
  • Tries
    • Try
      • R(G);CHECK
      • Refutation
        • K(d);N_SPINP(g),P-FLIGHT,XB(F)
  • Actual
    • S(I);
    • Threat
      • R1(G)
    • Vars
      • K(d);N_SPINP(g),OGATEB,S_FLIGHT,XR(G)::QAB(H)
      • R(c);SBLOCK,XB(F)::S(I)
      • R(i);SBLOCK,XR(G)::R1(D)
      • S(f);SBLOCK,XB(F)::S(I)
      • S(h);SBLOCK,XR(G)::P(B)
      • S(h);S_CUTB(b)::QAB1(H),XP(g)
      • S(h);S_CUTR(i)::R1(G)
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Developed and maintained by Brian Stephenson.
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