MESON Chess Problem Database

Problem Display
PID: 169906 (8/4Q1B1/p7/Rn2N3/K2krNP1/2pp4/3R4/5b1B w - - 0 1)

Culebra, Jose

SEPA, 1945

8/4Q1B1/p7/Rn2N3/K2krNP1/2pp4/3R4/5b1B

#2

9 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Rxd3#
    • 1...Re3
      • 2.Se6#
      • 2.Qb4#
    • 1...Bg2
      • 2.Rxd3#
    • 1...Bh3
      • 2.Rxd3#
    • 1...Sa3
      • 2.Qc5#
      • 2.Qa7#
    • 1...Sd6
      • 2.Qa7#
    • 1...Sa7
      • 2.Qc5#
      • 2.Qxa7#
    • 1...Sc7
      • 2.Qc5#
  • Tries
    • 1.Kb4?
      • threat
        • 2.Qc5#
      • 1...Sd6
        • 2.Qa7#
      • 1...Ke3+!
    • 1.Sexd3+?
      • 1...Kc4
        • 2.Qb4#
        • 2.Qc5#
      • 1...Re5
        • 2.Qc5#
      • 1...Ke3+!
    • 1.Sf3+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke3+!
    • 1.Sc4+?
      • 1...Kxc4
        • 2.Qb4#
      • 1...Re5!
    • 1.Sc6+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke3+!
    • 1.Sd7+?
      • 1...Kc4
        • 2.Sb6#
        • 2.Qb4#
        • 2.Qc5#
      • 1...Re5
        • 2.Qc5#
      • 1...Ke3+!
  • Keys
    • 1.Sfxd3!
      • threat
        • 2.Qc5#
      • 1...Ke3+
        • 2.Sc4#
      • 1...Kd5+
        • 2.Sb4#
      • 1...Bxd3
        • 2.Rxd3#
      • 1...Sd6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(e);S_CUTB(a)::R1(B),XP(c)
    • B(a);N_GUARD::R1(B),XP(c)
    • S(f);N_GUARD::QAB(H)
    • S(f);::QAB1(H)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAB1(H)
      • Vars
        • S(f);N_GUARD::QAB(H)
      • Refutation
        • K(d);CHECK,N_SPINP(c),S_FLIGHT
    • Try
      • S(G);CHECK,XP(c)
      • Vars
        • R(e);P_SPINR(e)::QAB1(H)
      • Refutation
        • K(d);CHECK,P_SPINR(e),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT::QAR1(H)
      • Refutation
        • K(d);CHECK,N_SPINP(c),P_SPINR(e),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT,XS(G)::QAR1(H)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINP(c),P-FLIGHT::QAR1(H)
      • Refutation
        • K(d);CHECK,N_SPINP(c),P_SPINR(e),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • R(e);P_SPINR(e)::QAB1(H)
      • Refutation
        • K(d);CHECK,N_SPINP(c),P_SPINR(e),S_FLIGHT
  • Actual
    • S(D);XP(c)
    • Threat
      • QAB1(H)
    • Vars
      • K(d);CHECK,S_FLIGHT::S(G)
      • K(d);CHECK,P-FLIGHT,P_SPINR(e),P_SPINS(f)::R(B)+S(D),DCHECK
      • B(a);OGATE,P_SPINB(a),XS(D)::R1(B),XB(a)
      • S(f);N_GUARD::QAB(H)
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