MESON Chess Problem Database

Problem Display
PID: 169917 (b7/4K3/4B3/1n1Pk2p/1p2p3/4P2R/2Q2p1r/8 w - - 0 1)

Culebra, Jose

SEPA, 1945

b7/4K3/4B3/1n1Pk2p/1p2p3/4P2R/2Q2p1r/8

#2

6 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Qb2#
      • 2.Qc7#
    • 1...Sd4
      • 2.Qc7#
    • 1...Sd6
      • 2.Qb2#
    • 1...Sa7
      • 2.Qb2#
      • 2.Qc7#
    • 1...Sc7
      • 2.Qb2#
      • 2.Qxc7#
    • 1...f1B
      • 2.Qxh2#
  • Tries
    • 1.Qb2+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc3!
    • 1.Qxf2?
      • threat
        • 2.Qg3#
        • 2.Qxh2#
        • 2.Qf4#
        • 2.Qf5#
        • 2.Qf6#
      • 1...Rxh3
        • 2.Qf4#
        • 2.Qf5#
        • 2.Qf6#
      • 1...Rh1
        • 2.Qg3#
        • 2.Qf4#
        • 2.Qf5#
        • 2.Qf6#
      • 1...Rg2
        • 2.Qf4#
        • 2.Qf5#
        • 2.Qf6#
      • 1...Sd4
        • 2.Qg3#
        • 2.Qxh2#
        • 2.Qf4#
        • 2.Qf6#
        • 2.exd4#
      • 1...Sd6
        • 2.Qg3#
        • 2.Qxh2#
        • 2.Qf4#
        • 2.Qf6#
      • 1...h4
        • 2.Qxh2#
        • 2.Qf4#
        • 2.Qf5#
        • 2.Qf6#
      • 1...Rxf2!
    • 1.Qc7+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sxc7!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Rf5#
      • 1...exf3
        • 2.Qf5#
      • 1...f1Q
        • 2.Qxh2#
      • 1...f1R
        • 2.Qxh2#
      • 1...Sd4
        • 2.Qc7#
      • 1...Sd6
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(e);N_GUARD::QAB(A)
    • P(a);OGATE::QAB(A),XR(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(A),XS(e)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • Q(A);XP(a)
      • Threat
        • DUALS(5)
      • Refutation
        • R(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(A),XS(e)
      • Refutation
        • S(e);XQ(A)
  • Actual
    • R(C);
    • Threat
      • R1(C)
    • Vars
      • P(d);OGATE,XR(C)::QAR1(A)
      • P(a);OGATE::QAB(A),XR(b)
      • S(e);N_GUARD::QAB(A)
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