MESON Chess Problem Database

Problem Display
PID: 187641 (Q2n4/2b5/1p1Bn3/5B2/5p2/8/R4KPk/8 w - - 0 1)

Mendes de Moraes Filho, Feliciano

Western Daily Mercury, 1909

Q2n4/2b5/1p1Bn3/5B2/5p2/8/R4KPk/8

#2

6 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qh8#
    • 1...Sb7
      • 2.Qh8#
  • Tries
    • 1.Ra3?
      • threat
        • 2.Rh3#
      • 1...Kh1
        • 2.Rh3#
      • 1...Sg5!
    • 1.Qf3?
      • threat
        • 2.Qh5#
        • 2.Qh3#
      • 1...Kh1
        • 2.Qh5#
        • 2.Qh3#
      • 1...Sg7
        • 2.Qh3#
      • 1...Sg5!
    • 1.Qa3?
      • threat
        • 2.Qh3#
      • 1...Kh1
        • 2.Qh3#
      • 1...Sg5!
    • 1.g3?
      • threat
        • 2.Qg2#
      • 1...fxg3+
        • 2.Kf1#
      • 1...Sc6
        • 2.Qh8#
      • 1...Sb7
        • 2.Qh8#
      • 1...f3!
  • Keys
    • 1.g4!
      • threat
        • 2.Qg2#
      • 1...fxg4 ep+
        • 2.Kf1#
      • 1...Kh3
        • 2.Qh1#
      • 1...Sc6
        • 2.Qh8#
      • 1...Sb7
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE::QAR(F)
  • Tries
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::R(A)
      • Refutation
        • S(d);
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(d);::QAR1(F)
      • Refutation
        • S(d);
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(F)
      • Refutation
        • S(d);
    • Try
      • P(C);N_PINP(b)
      • Threat
        • QAR1(F)
      • Vars
        • P(b);CHECK,P_SPINP(b),XP(C)::R(A)+K(B)
        • S(f);OGATE::QAR(F)
      • Refutation
        • P(b);
  • Actual
    • P(C);
    • Threat
      • QAR1(F)
    • Vars
      • P(b);CHECK,EP,XP(C)::R(A)+K(B)
      • K(a);N_GUARD,N_SPINP(b),P-FLIGHT::QAR2(F)
      • S(f);OGATE::QAR(F)
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