MESON Chess Problem Database

Problem Display
PID: 224205 (8/5p2/K1QB2bn/pNP5/rkPR1p2/1P4r1/1R5q/3BN3 w - - 0 1)

Petite, Efren

Suomen Shakki, 1995

8/5p2/K1QB2bn/pNP5/rkPR1p2/1P4r1/1R5q/3BN3

#2

11 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Rxb3#
  • Tries
    • 1.Qg2?
      • threat
        • 2.c6#
      • 1...Rg5
        • 2.bxa4#
      • 1...Sf5
        • 2.Sc2#
      • 1...Qh5!
    • 1.Qe4?
      • threat
        • 2.c6#
      • 1...Qh5
        • 2.Sc2#
      • 1...Rg5
        • 2.Sd3#
      • 1...Sf5!
  • Keys
    • 1.Qf3!
      • threat
        • 2.c6#
      • 1...Qh5
        • 2.bxa4#
      • 1...Rg5
        • 2.Qc3#
      • 1...Sf5
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);OGATE,P_SPINR(b),XP(D)::R1(C),XR(b)
  • Tries
    • Try
      • Q(J);
      • Threat
        • B(K)+P(H)
      • Vars
        • R(b);N_GUARD::R(C)+P(D),XR(c)
        • S(h);S_CUTB(g)::S(B)
      • Refutation
        • Q(a);
    • Try
      • Q(J);
      • Threat
        • B(K)+P(H)
      • Vars
        • Q(a);N_GUARD::S(B)
        • R(b);N_GUARD::S(B)
      • Refutation
        • S(h);
  • Actual
    • Q(J);
    • Threat
      • B(K)+P(H)
    • Vars
      • Q(a);N_GUARD::R(C)+P(D),XR(c)
      • R(b);N_GUARD::QAB1(J)
      • S(h);S_CUTB(g)::S(B)
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