MESON Chess Problem Database

Problem Display
PID: 146332 (6R1/8/4p2P/4PR2/N1P1kB2/6Qp/K2P2rN/7B w - - 0 1)

Subotic, Miroslav

The Problemist, 2012

6R1/8/4p2P/4PR2/N1P1kB2/6Qp/K2P2rN/7B

#2

12 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...exf5
      • 2.Qe3#
  • Tries
    • 1.Kb3?
      • 1...Kd4
        • 2.Qe3#
      • 1...exf5
        • 2.Qe3#
      • 1...Kxf5!
    • 1.Sb2?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qe3#
      • 1...exf5
        • 2.Qe3#
      • 1...Kxf5!
    • 1.Sc3+?
      • 1...Kxf5
        • 2.Rg5#
        • 2.Rf8#
      • 1...Kd4!
    • 1.Sc5+?
      • 1...Kxf5
        • 2.Rg5#
        • 2.Rf8#
      • 1...Kd4!
    • 1.Sb6?
      • 1...Kd4
        • 2.Qe3#
      • 1...exf5
        • 2.Qe3#
      • 1...Kxf5!
    • 1.Bxg2+?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kxf5
        • 2.Rg5#
        • 2.Rf8#
        • 2.Qg4#
        • 2.Qg5#
      • 1...hxg2!
    • 1.Be3?
      • 1...Kxf5
        • 2.Qf4#
      • 1...exf5
        • 2.Sc5#
      • 1...Kd3!
    • 1.Bg5?
      • 1...Kxf5
        • 2.Qf4#
      • 1...exf5
        • 2.Qe3#
      • 1...Kd4!
    • 1.Rc8?
      • 1...Kd4
        • 2.Qe3#
      • 1...exf5
        • 2.Qe3#
      • 1...Kxf5!
    • 1.Rd8?
      • threat
        • 2.Qd3#
      • 1...exf5
        • 2.Sc3#
        • 2.Sc5#
        • 2.Qe3#
        • 2.Qf3#
      • 1...Kxf5!
    • 1.Qxg2+?
      • 1...Kd3
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Kxf5
        • 2.Rf8#
        • 2.Qe4#
        • 2.Qg4#
        • 2.Qg5#
      • 1...hxg2!
    • 1.Qc3?
      • 1...exf5
        • 2.Qe3#
      • 1...Kxf5!
    • 1.Qf3+?
      • 1...Kxf5
        • 2.Bg3#
      • 1...Kd4!
    • 1.Qxh3?
      • 1...exf5
        • 2.Qe3#
      • 1...Kd4!
  • Keys
    • 1.Rg4!
      • 1...Kd4
        • 2.Bg5#
      • 1...Kxf5
        • 2.Qd3#
      • 1...exf5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK,XR(J)::QAR1(E)
  • Tries
    • Try
      • K(B);N_SPINP(C),S_FLIGHT
      • Vars
        • K(c);N_SPINR(a),P-FLIGHT::QAB1(E)
        • P(d);SBLOCK,XR(J)::QAR1(E)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT,XR(J)
    • Try
      • S(F);N_SPINP(C)
      • Threat
        • QAB1(E)
      • Vars
        • K(c);N_SPINR(a),P-FLIGHT::QAB1(E)
        • P(d);SBLOCK,XR(J)::QAR1(E)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT,XR(J)
    • Try
      • S(F);CHECK
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
    • Try
      • S(F);
      • Vars
        • K(c);N_SPINR(a),P-FLIGHT::QAB1(E)
        • P(d);SBLOCK,XR(J)::QAR1(E)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT,XR(J)
    • Try
      • B(A);CHECK,N_SPINP(C),XR(a)
      • Vars
        • K(c);P-FLIGHT::QAB1(E)
      • Refutation
        • P(b);XB(A)
    • Try
      • B(H);
      • Vars
        • K(c);N_SPINR(a),S_FLIGHT,XR(J)::QAR1(E)
        • P(d);SBLOCK,XR(J)::S(F)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT
    • Try
      • B(H);
      • Vars
        • K(c);N_SPINR(a),S_FLIGHT,XR(J)::QAR1(E)
        • P(d);SBLOCK,XR(J)::QAR1(E)
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
    • Try
      • R(L);
      • Vars
        • K(c);N_SPINR(a),P-FLIGHT::QAB1(E)
        • P(d);SBLOCK,XR(J)::QAR1(E)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT,XR(J)
    • Try
      • R(L);
      • Threat
        • QAB1(E)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT,XR(J)
    • Try
      • Q(E);CHECK,N_SPINP(C),XR(a)
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
        • K(c);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);P_SPINP(b),XQ(E)
    • Try
      • Q(E);
      • Vars
        • P(d);SBLOCK,XR(J)::QAR1(E)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT,XR(J)
    • Try
      • Q(E);CHECK,N_PINR(a)
      • Vars
        • K(c);S_FLIGHT,XR(J)::QAR(E)+B(H)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(E);XP(b)
      • Vars
        • P(d);SBLOCK,XR(J)::QAR1(E)
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
  • Actual
    • R(L);
    • Vars
      • K(c);N_SPINR(a),P-FLIGHT::R(L)+B(H)
      • K(c);N_SPINR(a),S_FLIGHT,XR(J)::QAB(E)
      • P(d);SBLOCK,XR(J)::QAR1(E)
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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).