MESON Chess Problem Database

Problem Display
PID: 276215 (2RNR3/K2n4/8/3p4/3k4/2pNp3/3n1r2/1B3Q2 w - - 0 1)

Petite, Efren

To Mat, 1954

2RNR3/K2n4/8/3p4/3k4/2pNp3/3n1r2/1B3Q2

#2

7 + 7

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Sc6#
    • 1...Se4
      • 2.Se6#
    • 1...e2
      • 2.Qxf2#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Qd3#
      • 1...Rxf1
        • 2.Se2#
      • 1...Re2
        • 2.Sxe2#
      • 1...Sc5
        • 2.Sc6#
      • 1...Se5
        • 2.Sfe6#
        • 2.Sde6#
      • 1...e2
        • 2.Qxf2#
      • 1...Sxf1!
  • Keys
    • 1.Sc1!
      • threat
        • 2.Qd3#
      • 1...Rxf1
        • 2.Se2#
      • 1...Sxf1
        • 2.Sb3#
      • 1...Re2
        • 2.Sxe2#
      • 1...Sc5
        • 2.Sc6#
      • 1...Se5
        • 2.Se6#
      • 1...e2
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(a);SBLOCK::S(F)
    • P(d);OGATEB::QAB(B),XR(b)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • R(b);N_GUARD,XQ(B)::S(C)
        • R(b);N_GUARD::S(C),XR(b)
        • S(g);SBLOCK::S(F)
        • P(d);OGATEB::QAB(B),XR(b)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • S(C);
    • Threat
      • QAR1(B)
    • Vars
      • R(b);N_GUARD,XQ(B)::S(C)
      • S(a);N_GUARD,XQ(B)::S(C)
      • R(b);N_GUARD::S(C),XR(b)
      • S(g);SBLOCK::S(F)
      • P(d);OGATEB::QAB(B),XR(b)
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