MESON Chess Problem Database

Problem Display
PID: 101764 (5rQ1/4p1Nn/4p2n/4N3/2PBk1b1/2K1P3/8/8 w - - 0 1)

Bouchez, Laurent

diagrammes, 1990

5rQ1/4p1Nn/4p2n/4N3/2PBk1b1/2K1P3/8/8

#2

7 + 7

6490 yacpdb 2009
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Qa8#
    • 1...Rf2
      • 2.Qa8#
    • 1...Rf3
      • 2.Qa8#
    • 1...Rf4
      • 2.Qa8#
    • 1...Rf5
      • 2.Qa8#
    • 1...Rf6
      • 2.Qa8#
    • 1...Rf7
      • 2.Qa8#
    • 1...Ra8
      • 2.Qxa8#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Sd2#
      • 1...Rxf3
        • 2.Qa8#
      • 1...Bxf3
        • 2.Qxe6#
      • 1...Kxf3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qg6#
      • 1...Rxf5
        • 2.Qa8#
      • 1...Bxf5
        • 2.Qg2#
      • 1...Sxf5
        • 2.Qxg4#
      • 1...exf5
        • 2.Qd5#

Anticipated by 137661(1931)

This anticipates 23948(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(g);OGATE::QAB(G)
    • R(g);OGATE,P_PINP(B)::QAB(G)
    • R(g);OGATE::QAB(G),XR(g)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • R(g);OGATE,P_PINP(B),SBLOCK,XS(E)::QAB(G)
        • B(b);N_GUARD,SBLOCK,XS(E)::QAR2(G),XP(c)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(F)::QAB1(G)
      • R(g);OGATE,SBLOCK,XS(F)::QAB(G)
      • B(b);OGATE,SBLOCK,XS(F)::QAB(G)
      • S(d);N_GUARD,XS(F)::QAR2(G),XB(b)
      • P(c);OGATE,SBLOCK,XS(F)::QAB1(G)
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