MESON Chess Problem Database

Problem Display
PID: 161769 (Q1q5/3p4/1P1p4/3P3R/2Nkp3/B2P4/pPprpP1K/2N5 w - - 0 1)

Dujardin, Paul

diagrammes, 1992

Q1q5/3p4/1P1p4/3P3R/2Nkp3/B2P4/pPprpP1K/2N5

#2

11 + 9

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Qh8#
    • 1...Qb7
      • 2.Qh8#
    • 1...Qxc4
      • 2.Qh8#
    • 1...Qc5
      • 2.Qh8#
    • 1...Qc6
      • 2.Qh8#
    • 1...Qc7
      • 2.Qh8#
    • 1...Qh8
      • 2.Qxh8#
    • 1...exd3
      • 2.Rh4#
    • 1...e3
      • 2.Rh4#
      • 2.fxe3#
  • Tries
    • 1.Sxd2?
      • threat
        • 2.Sdb3#
      • 1...exd3
        • 2.Scb3#
      • 1...Qc3
        • 2.Qh8#
      • 1...Qc4
        • 2.Qh8#
      • 1...a1S!
    • 1.Qxc8?
      • threat
        • 2.Qh8#
      • 1...Rxd3
        • 2.Sxe2#
      • 1...exd3!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Sb5#
      • 1...Rxd3
        • 2.Sxe2#
      • 1...exd3
        • 2.Sb3#
      • 1...Qa6
        • 2.Qh8#
      • 1...Qc4
        • 2.Qh8#
      • 1...Qc5
        • 2.Qh8#
      • 1...Qc6
        • 2.Qh8#
      • 1...Qc7
        • 2.Qh8#
      • 1...Qb8
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(i);OGATE::QAB(K)
    • Q(i);OGATE,XS(G)::QAB(K)
    • Q(i);OGATE,P_PINR(I)::QAB(K),XQ(i)
    • P(f);OGATEB,XP(F)::R(I)
  • Tries
    • Try
      • S(G);XR(c)
      • Threat
        • S(G)
      • Vars
        • P(f);SBLOCK,XP(F)::S(A)
        • Q(i);OGATE::QAB(K)
      • Refutation
        • P(a);
    • Try
      • Q(K);XQ(i)
      • Threat
        • QAB(K)
      • Vars
        • R(c);N_GUARD,SBLOCK,XP(F)::S(A),XP(d)
      • Refutation
        • P(f);XP(F)
  • Actual
    • S(G);XP(g)
    • Threat
      • S(G)
    • Vars
      • R(c);N_GUARD,SBLOCK,XP(F)::S(A),XP(d)
      • P(f);SBLOCK,XP(F)::S(A)
      • Q(i);OGATE::QAB(K)
      • Q(i);OGATE,P_PINS(G)::QAB(K)
      • Q(i);N_GUARD,P_PINS(G)::QAR(K)
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