MESON Chess Problem Database

Problem Display
PID: 2945 (7K/1N2p1B1/4Pn2/4kp2/2Q1p3/6R1/8/8 w - - 0 1)

Bolus, Andrew

Source?, 1913

7K/1N2p1B1/4Pn2/4kp2/2Q1p3/6R1/8/8

#2

6 + 5

2681 All Change Here! 1919

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qc7#
    • 1...e3
      • 2.Rxe3#
    • 1...f4
      • 2.Rg5#
  • Tries
    • 1.Ra3?
      • 1...e3
        • 2.Rxe3#
        • 2.Ra5#
      • 1...f4
        • 2.Ra5#
      • 1...Kf4!
    • 1.Rb3?
      • 1...e3
        • 2.Rxe3#
        • 2.Rb5#
      • 1...f4
        • 2.Rb5#
      • 1...Kf4!
    • 1.Re3?
      • 1...f4
        • 2.Qxe4#
      • 1...Kf4!
    • 1.Rh3?
      • 1...e3
        • 2.Rxe3#
      • 1...f4
        • 2.Rh5#
      • 1...Kf4!
    • 1.Qc5+?
      • 1...Kf4
        • 2.Qc7#
      • 1...Kxe6!
  • Keys
    • 1.Sd8!
      • 1...Kf4
        • 2.Qc7#
      • 1...Kd6
        • 2.Sf7#
      • 1...e3
        • 2.Sf7#
      • 1...f4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINS(d),P_SPINP(a),S_FLIGHT::QAB(B)
    • P(a);OGATEB::R(A),XP(a)
    • P(c);OGATEB,SBLOCK::R(A)
  • Tries
    • Try
      • R(A);
      • Vars
        • P(c);SBLOCK::R(A)
      • Refutation
        • K(b);N_SPINS(d),P_SPINP(a),S_FLIGHT
    • Try
      • R(A);
      • Vars
        • P(c);SBLOCK::R(A)
      • Refutation
        • K(b);N_SPINS(d),P_SPINP(a),S_FLIGHT
    • Try
      • R(A);P_PINP(a)
      • Vars
        • P(c);N_GUARD::QAR1(B),XP(a)
      • Refutation
        • K(b);N_SPINS(d),S_FLIGHT
    • Try
      • R(A);
      • Vars
        • P(a);OGATEB::R(A),XP(a)
        • P(c);OGATEB,SBLOCK::R(A)
      • Refutation
        • K(b);N_SPINS(d),P_SPINP(a),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINS(d),S_FLIGHT::QAB(B)
      • Refutation
        • K(b);N_SPINS(d),P-FLIGHT,XP(C)
  • Actual
    • S(D);
    • Vars
      • K(b);N_SPINS(d),P_SPINP(a),S_FLIGHT::QAB(B)
      • K(b);N_SPINS(d),S_FLIGHT::S(D)
      • P(a);::S(D)
      • P(c);SBLOCK::QAR2(B)
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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).