MESON Chess Problem Database

Problem Display
PID: 132457 (8/8/8/2K5/8/5N2/bk6/RnR1Q3 w - - 0 1)

Koltanowski, George

Source?, 0000

8/8/8/2K5/8/5N2/bk6/RnR1Q3

#2

5 + 3

2425 San Francisco Chronicle 0000

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa1
      • 2.Qc3#
      • 2.Qe5#
    • 1...Ka3
      • 2.Qb4#
    • 1...Kb3
      • 2.Qb4#
    • 1...Sa3
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
  • Tries
    • 1.Sd4?
      • 1...Kxa1
        • 2.Qc3#
      • 1...Ka3
        • 2.Qb4#
      • 1...Bb3
        • 2.Rcxb1#
      • 1...Bc4
        • 2.Rcxb1#
      • 1...Bd5
        • 2.Rcxb1#
      • 1...Be6
        • 2.Rcxb1#
      • 1...Bf7
        • 2.Rcxb1#
      • 1...Bg8
        • 2.Rcxb1#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sd2!
    • 1.Raxb1+?
      • 1...Ka3
        • 2.Qb4#
        • 2.Qa5#
      • 1...Bxb1!
    • 1.Rxa2+?
      • 1...Kb3
        • 2.Qe6#
      • 1...Kxa2!
    • 1.Rcxb1+?
      • 1...Kc2
        • 2.Qd2#
      • 1...Ka3
        • 2.Qb4#
        • 2.Qa5#
      • 1...Bxb1!
    • 1.Qd2+?
      • 1...Kxa1
        • 2.Qc3#
        • 2.Qd4#
      • 1...Ka3
        • 2.Qb4#
        • 2.Qxa2#
      • 1...Kb3
        • 2.Qb4#
        • 2.Qxa2#
      • 1...Sxd2!
    • 1.Qf2+?
      • 1...Kxa1
        • 2.Qd4#
      • 1...Kxc1
        • 2.Qd2#
      • 1...Ka3
        • 2.Qxa2#
      • 1...Kb3
        • 2.Qxa2#
      • 1...Sd2!
    • 1.Qb4+?
      • 1...Kxa1
        • 2.Qc3#
        • 2.Qd4#
      • 1...Kxc1
        • 2.Qd2#
      • 1...Bb3!
    • 1.Qe2+?
      • 1...Kxa1
        • 2.Qe5#
      • 1...Kxc1
        • 2.Qd2#
      • 1...Ka3
        • 2.Qxa2#
      • 1...Kb3
        • 2.Qxa2#
      • 1...Sd2!
  • Keys
    • 1.Qa5!
      • 1...Kxa1
        • 2.Qc3#
      • 1...Kxc1
        • 2.Qd2#
      • 1...Kb3
        • 2.Qb4#
        • 2.Qxa2#
      • 1...Bb3
        • 2.Raxb1#
      • 1...Bc4
        • 2.Raxb1#
      • 1...Bd5
        • 2.Raxb1#
      • 1...Be6
        • 2.Raxb1#
      • 1...Bf7
        • 2.Raxb1#
      • 1...Bg8
        • 2.Raxb1#
      • 1...Sd2
        • 2.Qc3#
        • 2.Qxa2#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • K(c);P_SPINB(b),S_FLIGHT::QAB1(C)
    • K(c);P-FLIGHT::QAR1(C)
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
  • Tries
    • Try
      • S(D);
      • Vars
        • K(c);P_SPINS(a),S_FLIGHT,XR(A)::QAB(C)
        • K(c);P_SPINB(b),S_FLIGHT::QAB1(C)
        • B(b);N_GUARD::R1(B),XS(a)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(A);CHECK,XS(a)
      • Refutation
        • B(b);XR(A)
    • Try
      • R(A);CHECK,XB(b)
      • Vars
        • K(c);P-FLIGHT::QAB(C)
      • Refutation
        • K(c);P-FLIGHT,XR(A)
    • Try
      • R(B);CHECK,XS(a)
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • B(b);XR(B)
    • Try
      • Q(C);CHECK
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P_SPINS(a),S_FLIGHT,XR(A)::QAB(C)
        • K(c);P_SPINS(a),S_FLIGHT,XR(B)::QAB1(C)
        • K(c);OGATE,P_SPINB(b),S_FLIGHT::QAR1(C),XB(b)
        • K(c);OGATE,P-FLIGHT::QAB1(C),XB(b)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P_SPINS(a),S_FLIGHT,XR(B)::QAB1(C)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P_SPINS(a),S_FLIGHT,XR(A)::QAB(C)
        • K(c);P_SPINS(a),S_FLIGHT,XR(B)::QAB1(C)
        • K(c);OGATE,P_SPINB(b),S_FLIGHT::QAR1(C),XB(b)
        • K(c);OGATE,P-FLIGHT::QAB1(C),XB(b)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • Q(C);
    • Vars
      • K(c);P_SPINB(b),P_SPINS(a),S_FLIGHT,XR(A)::QAB(C)
      • K(c);P_SPINS(a),S_FLIGHT,XR(B)::QAB1(C)
      • B(b);N_GUARD,SBLOCK::R1(A),XS(a)
      • B(b);N_GUARD::R1(A),XS(a)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
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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).