MESON Chess Problem Database

Problem Display
PID: 274672 (8/4p1p1/1p2B1Pp/1P2p2K/1P2k3/4p3/4Q3/8 w - - 0 1)

Groeneveld, Cornelis

Problem (Zagreb), 1953

8/4p1p1/1p2B1Pp/1P2p2K/1P2k3/4p3/4Q3/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc4#
    • 1...Kf4
      • 2.Qg4#
  • Tries
    • 1.Kg4?
      • threat
        • 2.Qc4#
      • 1...Kd4
        • 2.Qc4#
      • 1...h5+!
    • 1.Kh4?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf4
        • 2.Qg4#
      • 1...h5!
    • 1.Ba2?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qf3#
      • 1...e6!
    • 1.Bb3?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qf3#
      • 1...e6!
    • 1.Bg4?
      • threat
        • 2.Qc4#
      • 1...Kf4
        • 2.Qf3#
      • 1...Kd5
        • 2.Qd3#
      • 1...Kd4!
    • 1.Bd5+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf4
        • 2.Qf3#
        • 2.Qg4#
      • 1...Kf5
        • 2.Qf1#
        • 2.Qf3#
      • 1...Kxd5!
    • 1.Bf5+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kd5
        • 2.Qd3#
      • 1...Kxf5!
    • 1.Bf7?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qf3#
      • 1...e6!
    • 1.Bg8?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qf3#
      • 1...e6!
    • 1.Qd1?
      • 1...Kf4
        • 2.Qg4#
      • 1...e2!
    • 1.Qf1?
      • 1...Kd4
        • 2.Qc4#
      • 1...e2!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Qg4#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR2(A)
      • Vars
        • K(b);N_SPINP(a),P-FLIGHT::QAR1(A)
      • Refutation
        • P(e);CHECK
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
      • Refutation
        • P(e);
    • Try
      • B(E);
      • Vars
        • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::QAR2(A)
      • Refutation
        • P(f);
    • Try
      • B(E);
      • Vars
        • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::QAR2(A)
      • Refutation
        • P(f);
    • Try
      • B(E);
      • Threat
        • QAR2(A)
      • Vars
        • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • B(E);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XB(E)
    • Try
      • B(E);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XB(E)
    • Try
      • B(E);
      • Vars
        • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::QAR2(A)
      • Refutation
        • P(f);
    • Try
      • B(E);
      • Vars
        • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::QAR2(A)
      • Refutation
        • P(f);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(A)
      • Refutation
        • P(a);
  • Actual
    • B(E);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(A)
      • K(b);N_SPINP(a),P-FLIGHT::QAR1(A)
      • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::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).