MESON Chess Problem Database

Problem Display
PID: 109515 (8/2K5/8/2RNkP1P/5r2/2PQ4/2P3P1/8 w - - 0 1)

Theriault, Stephane

Matou, 1992

8/2K5/8/2RNkP1P/5r2/2PQ4/2P3P1/8

#2

9 + 2

6490 yacpdb 2009
3713 Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.cxd4#
    • 1...Rxf5
      • 2.Qe2#
      • 2.Qe3#
  • Tries
    • 1.Qg3?
      • threat
        • 2.Qxf4#
      • 1...Ke4
        • 2.Sf6#
        • 2.Qxf4#
      • 1...Kxf5!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Sf6#
        • 2.Qe6#
      • 1...Ke4
        • 2.Qe6#
      • 1...Kxf5
        • 2.Sf6#
      • 1...Rxf5
        • 2.Qe2#
      • 1...Rf1
        • 2.Qe6#
      • 1...Rf2
        • 2.Qe6#
      • 1...Rf3
        • 2.Qe6#
      • 1...Ra4
        • 2.Qe6#
      • 1...Rb4
        • 2.Qe6#
      • 1...Rc4
        • 2.Qe6#
      • 1...Rd4
        • 2.Qe6#
      • 1...Re4
        • 2.Qe6#
        • 2.Qf6#
      • 1...Rg4
        • 2.Qe6#
      • 1...Rh4
        • 2.Qe6#

Anticipated by 185029(1917)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE::P(C),XR(a)
  • Tries
    • Try
      • Q(D);P_PINR(a)
      • Threat
        • QAB1(D),XR(a)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT,XP(G)
  • Actual
    • Q(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT::QAR2(D)
      • K(b);P-FLIGHT,XP(G)::R(E)+S(F)
      • R(a);N_GUARD,SBLOCK,XP(G)::QAR(D)
      • R(a);::QAR1(D)
      • R(a);P_PINR(E)::QAR1(D)
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