MESON Chess Problem Database

Problem Display
PID: 168284 (8/8/Q7/7B/1P4r1/4p2b/1R2P1pK/4NkB1 w - - 0 1)

Petite, Efren

Horizon, 2011

8/8/Q7/7B/1P4r1/4p2b/1R2P1pK/4NkB1

#2

8 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe1
      • 2.Qa1#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Rb1#
      • 1...Rxb4
        • 2.Qa1#
      • 1...Rd4!
    • 1.Bxg4?
      • 1...Kxe1
        • 2.Qa1#
      • 1...Bxg4!
    • 1.Rb1?
      • threat
        • 2.Sc2#
        • 2.Sxg2#
        • 2.Sf3#
      • 1...Rc4
        • 2.Sc2#
      • 1...Rd4
        • 2.Sd3#
      • 1...Rxb4!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sxg2#
        • 2.Sd3#
        • 2.Sf3#
      • 1...Rc4
        • 2.Sc2#
      • 1...Rd4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);OGATEB,P-FLIGHT,XS(A)::QAR(H)
  • Tries
    • Try
      • S(A);
      • Threat
        • R(C)
      • Vars
        • R(e);XP(F)::QAR(H)
      • Refutation
        • R(e);
    • Try
      • B(G);XR(e)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(A)::QAR(H)
      • Refutation
        • B(d);XB(G)
    • Try
      • R(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(e);::R(C)+S(A)
      • Refutation
        • R(e);XP(F)
  • Actual
    • Q(H);
    • Threat
      • DUALS(3)
    • Vars
      • R(e);::QAR(H)+S(A)
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