MESON Chess Problem Database

Problem Display
PID: 186692 (BQ4n1/2nr1P1N/3k1qR1/5P2/1P1N2P1/1pB3P1/3K4/3R4 w - - 0 1)

Henry, S

Chess, 1960

BQ4n1/2nr1P1N/3k1qR1/5P2/1P1N2P1/1pB3P1/3K4/3R4

#2

13 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.Qf8#
    • 1...Qe6
      • 2.Rxe6#
    • 1...Se7
      • 2.Sb5#
  • Tries
    • 1.Kc1?
      • threat
        • 2.Sc6#
      • 1...Ke5
        • 2.Sf3#
      • 1...Ke7
        • 2.Qf8#
      • 1...Se7
        • 2.Sb5#
      • 1...b2+!
    • 1.Ke2?
      • threat
        • 2.Sc6#
      • 1...Qe6+
        • 2.Rxe6#
      • 1...Ke5
        • 2.Sf3#
      • 1...Ke7
        • 2.Qf8#
      • 1...Se7
        • 2.Sb5#
      • 1...Re7+!
    • 1.Ke3?
      • threat
        • 2.Sc6#
      • 1...Qe6+
        • 2.Rxe6#
      • 1...Ke5
        • 2.Sf3#
        • 2.Sc6#
      • 1...Ke7
        • 2.Qf8#
      • 1...Se7
        • 2.Sb5#
      • 1...Re7+!
    • 1.Rxf6+?
      • 1...Ke5
        • 2.Re1#
        • 2.Re6#
      • 1...Ke7
        • 2.Qf8#
        • 2.fxg8S#
        • 2.f8Q#
        • 2.f8B#
      • 1...Sxf6!
    • 1.Qb6+?
      • 1...Ke5
        • 2.Re1#
      • 1...Ke7!
    • 1.f8Q+?
      • 1...Ke5
        • 2.Re1#
      • 1...Se7
        • 2.Sb5#
        • 2.Qxf6#
      • 1...Re7!
    • 1.f8B+?
      • 1...Ke5
        • 2.Re1#
      • 1...Se7
        • 2.Sb5#
      • 1...Re7!
  • Keys
    • 1.Ke1!
      • threat
        • 2.Sc6#
      • 1...Qe6+
        • 2.Rxe6#
      • 1...Re7+
        • 2.Se2#
      • 1...Ke5
        • 2.Sf3#
      • 1...Ke7
        • 2.Qf8#
      • 1...Se7
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINQ(c),N_SPINS(d),P_PINS(F),S_FLIGHT::QAB1(M)
    • Q(c);OGATE::R1(I),XQ(c)
    • S(f);SBLOCK::S(F)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • R(A)+S(F)
      • Vars
        • K(b);N_SPINQ(c),S_FLIGHT::B(C)+S(F),DCHECK
        • K(b);N_SPINQ(c),N_SPINS(d),S_FLIGHT::QAB1(M)
        • S(f);SBLOCK::R(A)+S(F),DCHECK
      • Refutation
        • P(a);CHECK
    • Try
      • K(B);P-FLIGHT
      • Threat
        • R(A)+S(F)
      • Vars
        • Q(c);CHECK,OGATE::R1(I),XQ(c)
        • K(b);N_SPINQ(c),S_FLIGHT::B(C)+S(F),DCHECK
        • K(b);N_SPINQ(c),N_SPINS(d),S_FLIGHT::QAB1(M)
        • S(f);SBLOCK::R(A)+S(F),DCHECK
      • Refutation
        • R(e);CHECK
    • Try
      • K(B);S_FLIGHT
      • Threat
        • R(A)+S(F)
      • Vars
        • Q(c);CHECK,OGATE::R1(I),XQ(c)
        • K(b);N_SPINQ(c),N_SPINS(d),S_FLIGHT::QAB1(M)
        • S(f);SBLOCK::R(A)+S(F),DCHECK
      • Refutation
        • R(e);CHECK
    • Try
      • R(I);CHECK,XQ(c)
      • Refutation
        • S(f);XR(I)
    • Try
      • Q(M);CHECK,N_PINS(d)
      • Vars
        • K(b);N_SPINQ(c),P_PINS(F),S_FLIGHT::R(A)
      • Refutation
        • K(b);N_SPINQ(c),P_PINS(F),S_FLIGHT
    • Try
      • P(J);CHECK
      • Vars
        • K(b);N_SPINQ(c),P_PINS(F),S_FLIGHT::R(A)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • P(J);CHECK
      • Vars
        • K(b);N_SPINQ(c),P_PINS(F),S_FLIGHT::R(A)
        • S(f);::S(F)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • R(A)+S(F)
    • Vars
      • Q(c);CHECK,OGATE::R1(I),XQ(c)
      • R(e);CHECK,SBLOCK::R(A)+S(F)
      • K(b);N_SPINQ(c),S_FLIGHT::B(C)+S(F),DCHECK
      • K(b);N_SPINQ(c),N_SPINS(d),S_FLIGHT::QAB1(M)
      • S(f);SBLOCK::R(A)+S(F),DCHECK
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).