MESON Chess Problem Database

Problem Display
PID: 232093 (1b2rq2/pQPn2r1/2KPRP2/2p1PN2/4k2N/n7/p7/2B2B2 w - - 0 1)

Doukhan, Gerard

diagrammes, 1975

1b2rq2/pQPn2r1/2KPRP2/2p1PN2/4k2N/n7/p7/2B2B2

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6+
      • 2.Kxd6#
    • 1...Rg1
      • 2.Kxd7#
    • 1...Rg2
      • 2.Kxd7#
    • 1...Rg3
      • 2.Kxd7#
    • 1...Rg4
      • 2.Kxd7#
    • 1...Rg5
      • 2.Kxd7#
    • 1...Rg6
      • 2.Kxd7#
    • 1...Rg8
      • 2.Kxd7#
    • 1...Bxc7
      • 2.Kxc7#
    • 1...Sb1
      • 2.Kb5#
    • 1...Sc2
      • 2.Kb5#
    • 1...Sc4
      • 2.Kb5#
    • 1...Sb5
      • 2.Kxb5#
    • 1...Sxe5+
      • 2.Kxc5#
  • Tries
    • 1.Sg3+?
      • 1...Kd4
        • 2.Qb2#
      • 1...Rxg3!
    • 1.Qb4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...c4
        • 2.Qe1#
      • 1...cxb4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qe2#
      • 1...Qxd6+
        • 2.Sxd6#
      • 1...Sxe5+
        • 2.Qxe5#
      • 1...Rg2
        • 2.Qxg2#
      • 1...Rg3
        • 2.Sxg3#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sc4
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(j);CHECK,XP(G)::QAB(J)+K(F),XQ(j)
    • R(g);::QAB(J)+K(F),XS(f)
    • B(h);XP(K)::QAB(J)+K(F),XB(h)
    • S(b);::QAB(J)+K(F)
    • S(b);::QAB(J)+K(F),XS(b)
    • S(f);CHECK,P_SPINS(f),XP(D)::QAB(J)+K(F),XP(d)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(J)
      • Refutation
        • R(g);XS(E)
    • Try
      • Q(J);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(J),XS(b)
        • P(d);P_SPINP(d)::QAR(J)
      • Refutation
        • P(d);XQ(J)
  • Actual
    • Q(J);
    • Threat
      • QAR2(J)
    • Vars
      • Q(j);CHECK,XP(G)::S(E),XQ(j)
      • S(f);CHECK,OGATE,P_SPINS(f),XP(D)::QAR1(J),XS(f)
      • R(g);N_GUARD::QAB(J),XR(g)
      • R(g);N_GUARD::S(E),XR(g)
      • S(b);N_GUARD::QAB(J),XS(b)
      • S(b);N_GUARD::QAB(J)
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Developed and maintained by Brian Stephenson.
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