MESON Chess Problem Database

Problem Display
PID: 225845 (8/2K3p1/5RB1/2R2Np1/Q1N2k1r/3p1pbq/5p2/3b4 w - - 0 1)

Wirtanen, Erkki Aukusti

Praca, 1959

8/2K3p1/5RB1/2R2Np1/Q1N2k1r/3p1pbq/5p2/3b4

#2

7 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4+
      • 2.Scd6#
    • 1...Kg4+
      • 2.Se5#
    • 1...Rg4
      • 2.Sxg7#
    • 1...Be2
      • 2.Sb2#
      • 2.Sd2#
      • 2.Sa3#
      • 2.Sce3#
      • 2.Sa5#
      • 2.Se5#
      • 2.Sb6#
      • 2.Scd6#
    • 1...g4
      • 2.Sxg7#
  • Tries
    • 1.Sxg7+?
      • 1...Kg4+
        • 2.Se5#
      • 1...Qf5!
    • 1.Rd5?
      • threat
        • 2.Rd4#
      • 1...Kg4+
        • 2.Se5#
      • 1...g4
        • 2.Sxg7#
      • 1...Ke4+!
    • 1.Qa1?
      • threat
        • 2.Qd4#
      • 1...Ke4+
        • 2.Sxg3#
        • 2.Sfd6#
      • 1...g4
        • 2.Sxg7#
      • 1...Kg4+!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd4#
      • 1...Ke4+
        • 2.Sxg3#
      • 1...Kg4+
        • 2.Sfd6#
      • 1...g4
        • 2.Sxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(g);CHECK,P-FLIGHT::QAR(A)+S(B),DCHECK
    • R(h);SBLOCK,S_CUTQ(f)::R(E)+S(D),XP(j)
    • P(i);SBLOCK,S_CUTQ(f)::R(E)+S(D),XP(j)
  • Tries
    • Try
      • S(D);CHECK,XP(j)
      • Vars
        • K(g);CHECK,P-FLIGHT::QAR(A)+S(B),DCHECK
      • Refutation
        • Q(f);P_SPINQ(f)
    • Try
      • R(C);
      • Threat
        • R(C)
      • Vars
        • K(g);CHECK,P-FLIGHT::QAR(A)+S(B),DCHECK
        • P(i);SBLOCK,S_CUTQ(f)::R(E)+S(D),XP(j)
      • Refutation
        • K(g);CHECK,P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(i);SBLOCK,S_CUTQ(f)::R(E)+S(D),XP(j)
      • Refutation
        • K(g);CHECK,P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(g);CHECK,P-FLIGHT::B(F)+S(D),DCHECK,XB(e)
      • K(g);CHECK,P-FLIGHT::QAB(A)+S(D)
      • P(i);S_CUTQ(f)::R(E)+S(D),XP(j)
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Developed and maintained by Brian Stephenson.
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