MESON Chess Problem Database

Problem Display
PID: 84883 (2K2bb1/4prrp/Q5pP/1N2kpR1/6p1/n5P1/3N4/7B w - - 0 1)

Petite, Efren

Die Schwalbe, 1964

2K2bb1/4prrp/Q5pP/1N2kpR1/6p1/n5P1/3N4/7B

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sc4#
    • 1...Sc2
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
  • Tries
    • 1.Qc6?
      • 1...e6
        • 2.Qc3#
      • 1...Rf6
        • 2.Qe4#
      • 1...Sb1
        • 2.Sc4#
      • 1...Sc2
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sxb5!
  • Keys
    • 1.Qb6!
      • 1...Sxb5
        • 2.Sc4#
      • 1...e6
        • 2.Qd4#
      • 1...Rf6
        • 2.Qe3#
      • 1...Sb1
        • 2.Sc4#
      • 1...Sc2
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
  • Tries
    • Try
      • Q(F);
      • Vars
        • P(f);SBLOCK::QAB(F)
        • R(g);SBLOCK::QAR1(F)
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
      • Refutation
        • S(a);XS(D)
  • Actual
    • Q(F);
    • Vars
      • S(a);N_GUARD,XS(D)::S(B)
      • P(f);SBLOCK::QAB1(F)
      • R(g);SBLOCK::QAR2(F)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
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