MESON Chess Problem Database

Problem Display
PID: 258711 (6b1/7q/Q1N1k3/1P1RpR1N/5P2/P4P2/2B5/1K6 w - - 0 1)

Taverner, Thomas

Source?, 0000

6b1/7q/Q1N1k3/1P1RpR1N/5P2/P4P2/2B5/1K6

#2

11 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Rfxe5#
    • 1...Bf7
      • 2.Rfxe5#
    • 1...exf4
      • 2.Sxf4#
  • Tries
    • 1.Be4?
      • threat
        • 2.Rf6#
      • 1...Qxh5
        • 2.Qc8#
      • 1...Qg6
        • 2.Qc8#
      • 1...Qh6
        • 2.Qc8#
      • 1...Qe7
        • 2.Sd4#
        • 2.Sd8#
      • 1...Qf7
        • 2.Rfxe5#
      • 1...Qg7
        • 2.Sxg7#
      • 1...Qh8
        • 2.Qc8#
      • 1...Qxf5!
    • 1.Rd1?
      • threat
        • 2.Rf6#
      • 1...Qxh5
        • 2.Qc8#
      • 1...Qg6
        • 2.Qc8#
      • 1...Qh6
        • 2.Qc8#
      • 1...Qe7
        • 2.Sd8#
      • 1...Qf7
        • 2.Rxe5#
      • 1...Qg7
        • 2.Sxg7#
      • 1...Qh8
        • 2.Qc8#
      • 1...Qxf5!
    • 1.Rd2?
      • threat
        • 2.Rf6#
      • 1...Qxh5
        • 2.Qc8#
      • 1...Qg6
        • 2.Qc8#
      • 1...Qh6
        • 2.Qc8#
      • 1...Qe7
        • 2.Sd8#
      • 1...Qf7
        • 2.Rxe5#
      • 1...Qg7
        • 2.Sxg7#
      • 1...Qh8
        • 2.Qc8#
      • 1...Qxf5!
    • 1.Qc8+?
      • 1...Qd7
        • 2.Qxd7#
      • 1...Kxd5!
  • Keys
    • 1.Bb3!
      • 1...Qxf5+
        • 2.Rd3#
      • 1...Kxf5
        • 2.Sd4#
      • 1...Qxh5
        • 2.Qc8#
      • 1...exf4
        • 2.Sxf4#
      • 1...Qg6
        • 2.Qc8#
      • 1...Qh6
        • 2.Qc8#
      • 1...Qa7
        • 2.Rf6#
      • 1...Qb7
        • 2.Rf6#
      • 1...Qc7
        • 2.Rf6#
      • 1...Qd7
        • 2.Rf6#
      • 1...Qe7
        • 2.Sd4#
      • 1...Qf7
        • 2.Rfxe5#
      • 1...Qg7
        • 2.Sxg7#
      • 1...Qh8
        • 2.Qc8#
      • 1...Bf7
        • 2.Qc8#
      • 1...e4
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • Q(c);SBLOCK::R1(H),XP(a)
    • B(d);SBLOCK::R1(H),XP(a)
    • P(a);XP(E)::S(I),XP(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • R1(H)
      • Vars
        • Q(c);N_GUARD,XS(I)::QAB(J)
        • Q(c);N_GUARD::QAB(J)
        • Q(c);SBLOCK::R1(H),XP(a)
        • Q(c);N_GUARD::S(I),XQ(c)
      • Refutation
        • Q(c);P_PINB(B),XR(H)
    • Try
      • R(G);
      • Threat
        • R1(H)
      • Vars
        • Q(c);N_GUARD,XS(I)::QAB(J)
        • Q(c);N_GUARD::QAB(J)
        • Q(c);SBLOCK::QAR(J)+S(K),DCHECK
        • Q(c);SBLOCK::R1(H),XP(a)
        • Q(c);N_GUARD::S(I),XQ(c)
      • Refutation
        • Q(c);P_PINB(B),XR(H)
    • Try
      • R(G);
      • Threat
        • R1(H)
      • Vars
        • Q(c);N_GUARD,XS(I)::QAB(J)
        • Q(c);N_GUARD::QAB(J)
        • Q(c);SBLOCK::QAR(J)+S(K),DCHECK
        • Q(c);SBLOCK::R1(H),XP(a)
        • Q(c);N_GUARD::S(I),XQ(c)
      • Refutation
        • Q(c);P_PINB(B),XR(H)
    • Try
      • Q(J);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(J),XQ(c)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT,XR(G)
  • Actual
    • B(B);P_SPINR(H)
    • Vars
      • Q(c);CHECK,SBLOCK,XR(H)::B(B)+R(G)
      • K(b);N_GUARD,P_SPINP(a),S_FLIGHT,XR(H)::S(K)
      • Q(c);N_GUARD,N_PINR(H),XS(I)::QAB(J)
      • P(a);XP(E)::S(I),XP(a)
      • Q(c);N_GUARD::QAB(J)
      • Q(c);N_GUARD,N_PINR(H)::QAB(J)
      • Q(c);N_PINR(H)::R1(H)
      • Q(c);N_PINR(H),SBLOCK::QAR(J)+S(K),DCHECK
      • Q(c);N_PINR(H),SBLOCK::R1(H),XP(a)
      • Q(c);N_GUARD,N_PINR(H)::S(I),XQ(c)
      • B(d);S_CUTQ(c)::QAB(J)
      • P(a);N_PINR(H)::R1(H)
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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).