MESON Chess Problem Database

Problem Display
PID: 164472 (5R2/1p2pP2/4k3/1N3r2/3P2B1/3P2K1/8/7Q w - - 0 1)

Ben-Zvi, Yoav

StrateGems, 2015

5R2/1p2pP2/4k3/1N3r2/3P2B1/3P2K1/8/7Q

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qh6#
    • 1...Kd7
      • 2.Qd5#
    • 1...b6
      • 2.Qc6#
  • Tries
    • 1.Kh2?
      • 1...Kd7
        • 2.Qd5#
      • 1...b6
        • 2.Qc6#
      • 1...Kf6!
    • 1.Kh3?
      • 1...Kd7
        • 2.Qd5#
      • 1...b6
        • 2.Qc6#
      • 1...Kf6!
    • 1.Kh4?
      • 1...Kd7
        • 2.Qd5#
      • 1...b6
        • 2.Qc6#
      • 1...Kf6!
    • 1.Bh3?
      • 1...Kd7
        • 2.Qd5#
      • 1...b6
        • 2.Qc6#
      • 1...Kf6!
    • 1.Qg2?
      • 1...Kd7
        • 2.Qd5#
      • 1...b6
        • 2.Qc6#
      • 1...Kf6!
    • 1.Qf3?
      • threat
        • 2.Qxf5#
      • 1...Kd7
        • 2.Qd5#
      • 1...Kf6!
    • 1.Qe4+?
      • 1...Kd7
        • 2.Qd5#
      • 1...Kf6!
    • 1.Qh6+?
      • 1...Kd5
        • 2.Rd8#
      • 1...Kd7!
  • Keys
    • 1.Qc1!
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf6
        • 2.Qh6#
      • 1...Kd7
        • 2.Qc8#
      • 1...b6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINR(a),P-FLIGHT::QAR2(A)
    • K(b);S_FLIGHT::QAR2(A)
    • P(c);N_GUARD::QAR2(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
        • P(c);N_GUARD::QAR2(A)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
        • P(c);N_GUARD::QAR2(A)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
        • P(c);N_GUARD::QAR2(A)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • B(E);
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
        • P(c);N_GUARD::QAR2(A)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
        • P(c);N_GUARD::QAR2(A)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XR(a)
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);N_SPINR(a),P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT::R(H)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);N_SPINR(a),S_FLIGHT::QAB1(A)
      • K(b);N_SPINR(a),P-FLIGHT::QAR2(A)
      • K(b);S_FLIGHT::QAB1(A)
      • P(c);N_GUARD::QAR2(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).