MESON Chess Problem Database

Problem Display
PID: 222478 (6n1/3B1pP1/5k1p/2Q3NP/3N3R/8/K7/3R4 w - - 0 1)

Whitner, HK

Philadelphia Times, 1883

6n1/3B1pP1/5k1p/2Q3NP/3N3R/8/K7/3R4

#2

9 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sf5?
      • threat
        • 2.Se4#
        • 2.Sh7#
      • 1...hxg5
        • 2.Rd6#
        • 2.Qd4#
        • 2.Qd6#
        • 2.Qc3#
      • 1...Kxg5!
    • 1.Sde6?
      • threat
        • 2.Se4#
        • 2.Sh7#
        • 2.Rf1#
        • 2.Rf4#
      • 1...hxg5
        • 2.Rf1#
        • 2.Qxg5#
      • 1...Se7
        • 2.Se4#
        • 2.Sh7#
      • 1...fxe6!
    • 1.Rg1?
      • threat
        • 2.Se4#
        • 2.Sh7#
      • 1...hxg5
        • 2.Qxg5#
      • 1...Kxg7!
    • 1.Rg4?
      • threat
        • 2.Se4#
        • 2.Sh7#
      • 1...hxg5
        • 2.Qxg5#
      • 1...Kxg7!
    • 1.Qb6+?
      • 1...Ke5
        • 2.Sdf3#
      • 1...Kxg5
        • 2.Sf3#
      • 1...Ke7
        • 2.Sf5#
      • 1...Kxg7!
    • 1.Qd6+?
      • 1...Kxg5
        • 2.Sf3#
        • 2.Qf4#
      • 1...Kxg7!
    • 1.Qf5+?
      • 1...Ke7
        • 2.Sc6#
      • 1...Kxg7!
  • Keys
    • 1.Qc3!
      • 1...Ke5
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sdf3#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sc6#
      • 1...Kxg5
        • 2.Sf3#
      • 1...Ke7
        • 2.Sc6#
      • 1...Kxg7
        • 2.Sde6#
      • 1...hxg5
        • 2.Sf5#
        • 2.Sc6#
      • 1...Se7
        • 2.Sdf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
    • Try
      • S(C);
      • Threat
        • DUALS(4)
      • Refutation
        • P(c);XS(C)
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE,XS(F)::QAB1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE,XS(F)::QAB1(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::S(C)
        • K(a);S_FLIGHT,XS(F)::S(C)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(I)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT,XP(I)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT,XS(F)::S(C)
      • K(a);S_FLIGHT::S(C)
      • K(a);S_FLIGHT,XP(I)::QAB(E)+S(C),DCHECK
      • S(d);SBLOCK::QAB(E)+S(C)
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