MESON Chess Problem Database

Problem Display
PID: 261353 (3Q4/2N5/1n3p1r/3r1k1p/3p4/3p1K2/6RB/5R1B w - - 0 1)

Larose, Franck

Neue Zurcher Zeitung, 1989

3Q4/2N5/1n3p1r/3r1k1p/3p4/3p1K2/6RB/5R1B

#2

7 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qxd5#
    • 1...Sa8
      • 2.Qxd5#
    • 1...Sc8
      • 2.Qxd5#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Qe4#
        • 2.Qe6#
      • 1...Rd6
        • 2.Qe4#
      • 1...Re5!
    • 1.Qe8?
      • threat
        • 2.Qe4#
        • 2.Qe6#
      • 1...Rd6
        • 2.Qe4#
      • 1...Re5!
  • Keys
    • 1.Kg3+!
      • 1...Ke4
        • 2.Re2#
      • 1...Ke5
        • 2.Qe7#
      • 1...Kg5
        • 2.Kh3#
      • 1...Kg6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(f);N_GUARD::QAR2(G),XR(c)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAB1(G)
      • Refutation
        • R(c);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::QAB1(G)
      • Refutation
        • R(c);
  • Actual
    • K(E);CHECK,P-FLIGHT
    • Vars
      • K(d);N_GUARD,S_FLIGHT::B(B)+R(C),DCHECK
      • K(d);N_GUARD,P-FLIGHT::QAR2(G)
      • K(d);N_GUARD,P-FLIGHT,P_SPINP(g)::R(C)+K(E)
      • K(d);N_GUARD,S_FLIGHT::QAR2(G)
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