MESON Chess Problem Database

Problem Display
PID: 274679 (2b3QK/p1p1R3/4np2/1BPkpN2/4n2R/3Nr3/8/6B1 w - - 0 1)

Petite, Efren

To Mat, 1955

2b3QK/p1p1R3/4np2/1BPkpN2/4n2R/3Nr3/8/6B1

#2

9 + 9

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Sb4#
    • 1...Re2
      • 2.Sb4#
    • 1...Rf3
      • 2.Sb4#
    • 1...Rg3
      • 2.Sb4#
    • 1...Rh3
      • 2.Sb4#
    • 1...Ba6
      • 2.Qxe6#
    • 1...Bb7
      • 2.Qxe6#
    • 1...Sd2
      • 2.Sxe3#
    • 1...Sf2
      • 2.Sxe3#
    • 1...Sc3
      • 2.Sxe3#
    • 1...Sg3
      • 2.Sxe3#
    • 1...Sxc5
      • 2.Sb4#
    • 1...Sg5
      • 2.Sxe3#
    • 1...Sd6
      • 2.Sxe3#
  • Tries
    • 1.Rxe6?
      • threat
        • 2.Rxe5#
        • 2.Rd6#
      • 1...Rxd3
        • 2.Se7#
        • 2.Rd6#
      • 1...Sd6
        • 2.Sxe3#
        • 2.Se7#
        • 2.Rxe5#
        • 2.Rxd6#
      • 1...Bxe6!
    • 1.Rxc7?
      • threat
        • 2.Sb4#
      • 1...Rxd3
        • 2.Se7#
      • 1...a5!
    • 1.Rd7+?
      • 1...Sd6
        • 2.Sxe3#
        • 2.Se7#
      • 1...Bxd7!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qa2#
      • 1...Rxd3
        • 2.Qxe4#
      • 1...Sxc5
        • 2.Sb4#
      • 1...Re2
        • 2.Sb4#
      • 1...Sd4
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • R(a);::S(B)
    • R(a);P_PINR(C)::S(B)
    • B(i);N_GUARD::QAB1(H),XS(e)
    • S(b);::S(F),XR(a)
    • S(b);SBLOCK,XP(E)::S(B)
  • Tries
    • Try
      • R(G);XS(e)
      • Threat
        • DUALS(2)
      • Refutation
        • B(i);P_SPINB(i),XR(G)
    • Try
      • R(G);XP(h)
      • Threat
        • S(B)
      • Vars
        • R(a);XS(B)::S(F)
      • Refutation
        • P(g);
    • Try
      • R(G);CHECK
      • Refutation
        • B(i);XR(G)
  • Actual
    • Q(H);N_PINS(e),P_PINS(b)
    • Threat
      • QAB(H)
    • Vars
      • R(a);N_GUARD,XS(B)::QAB1(H),XS(b)
      • S(e);SBLOCK,XP(E)::S(B)
      • R(a);::S(B)
      • S(e);SBLOCK::S(F),XR(a)
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Developed and maintained by Brian Stephenson.
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