MESON Chess Problem Database

Problem Display
PID: 134634 (n1Kb4/rBnQ4/pp6/3P1Rpp/3NkPqR/4p3/4P3/B1N5 w - - 0 1)

Guida, Marco

Comm., StrateGems, 2009

n1Kb4/rBnQ4/pp6/3P1Rpp/3NkPqR/4p3/4P3/B1N5

#2

11 + 11

145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Re5#
    • 1...Qf3
      • 2.Re5#
      • 2.exf3#
    • 1...Qh3
      • 2.Re5#
    • 1...Qxf5
      • 2.Qxf5#
    • 1...Qg1
      • 2.Re5#
    • 1...Qg2
      • 2.Re5#
    • 1...Qg3
      • 2.Re5#
    • 1...Sb5
      • 2.Qe6#
    • 1...Sxd5
      • 2.Bxd5#
      • 2.Qe6#
      • 2.Qxd5#
    • 1...Se6
      • 2.Qxe6#
    • 1...Se8
      • 2.Qe6#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Qc2#
      • 1...Qxe2
        • 2.Re5#
      • 1...Qxf5+!
    • 1.Qe7+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Bxe7!
    • 1.d6+?
      • 1...Sd5
        • 2.Bxd5#
        • 2.Qe6#
      • 1...Rxb7!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qc2#
      • 1...Qxf5+
        • 2.Se6#
      • 1...Qxe2
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • Q(c);XP(C)::R1(H)
    • Q(c);::R1(H)
    • Q(c);OGATE,P_PINQ(J),XR(H)::QAB1(J),XQ(c)
    • S(i);N_GUARD::QAR2(J)
    • S(i);N_GUARD::QAR2(J),XS(i)
  • Tries
    • Try
      • Q(J);P_SPINR(H)
      • Threat
        • QAB(J)
      • Vars
        • Q(c);N_PINR(H),XP(C)::R1(H)
      • Refutation
        • Q(c);CHECK,XR(H)
    • Try
      • Q(J);CHECK,P_SPINR(H)
      • Vars
        • S(i);N_GUARD,N_PINR(H),P_SPINS(i)::QAR2(J),XS(i)
      • Refutation
        • B(k);XQ(J)
    • Try
      • P(G);CHECK
      • Refutation
        • R(h);XB(I)
  • Actual
    • Q(J);P_SPINR(H)
    • Threat
      • QAB(J)
    • Vars
      • Q(c);CHECK,SBLOCK,XR(H)::QAR(J)+S(D)
      • Q(c);N_PINR(H),XP(C)::R1(H)
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