MESON Chess Problem Database

Problem Display
PID: 218572 (4N3/6p1/4p1p1/1B1pk1B1/4p3/8/1K1Q4/8 w - - 0 1)

Arnold, William E

Cincinnati Commercial, 1882

4N3/6p1/4p1p1/1B1pk1B1/4p3/8/1K1Q4/8

#2

5 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qf4#
  • Tries
    • 1.Bf1?
      • 1...Kf5
        • 2.Qf4#
      • 1...d4
        • 2.Qa5#
      • 1...e3!
    • 1.Be2?
      • 1...Kf5
        • 2.Qf4#
      • 1...d4
        • 2.Qa5#
      • 1...e3!
    • 1.Ba4?
      • 1...Kf5
        • 2.Qf4#
      • 1...d4
        • 2.Qa5#
      • 1...e3!
    • 1.Ba6?
      • 1...Kf5
        • 2.Qf4#
      • 1...d4
        • 2.Qa5#
      • 1...e3!
    • 1.Bc6?
      • 1...Kf5
        • 2.Qf4#
      • 1...d4
        • 2.Qf4#
        • 2.Qa5#
      • 1...e3!
    • 1.Bd7?
      • 1...Kf5
        • 2.Qf4#
      • 1...d4
        • 2.Qa5#
      • 1...e3!
    • 1.Bf6+?
      • 1...Kf5
        • 2.Qg5#
      • 1...gxf6!
    • 1.Qc1?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf5
        • 2.Qf4#
      • 1...d4
        • 2.Qc5#
      • 1...e3!
    • 1.Qc3+?
      • 1...d4
        • 2.Qc5#
      • 1...Kf5!
    • 1.Qe3?
      • 1...Kf5
        • 2.Qf4#
      • 1...d4!
    • 1.Qb4?
      • 1...d4
        • 2.Qc5#
      • 1...e3
        • 2.Qf4#
      • 1...Kf5!
    • 1.Qf2?
      • 1...e3
        • 2.Qf4#
      • 1...d4!
    • 1.Qh2+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kd4!
  • Keys
    • 1.Bd3!
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf5
        • 2.Qf4#
      • 1...exd3
        • 2.Qf4#
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • B(C);
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • P(b);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • P(b);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • P(b);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • P(b);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Vars
        • K(c);P-FLIGHT,P_SPINP(d)::QAR1(B)
        • P(b);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • P(a);
    • Try
      • B(D);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
      • Refutation
        • P(f);XB(D)
    • Try
      • Q(B);
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
        • K(c);P-FLIGHT::QAR1(B)
        • P(b);OGATEB::QAR2(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b)::QAR2(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);P_PINP(a)
      • Vars
        • K(c);N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Vars
        • P(b);OGATEB::QAR2(B)
        • P(a);OGATE::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • P(a);::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • B(C);
    • Vars
      • K(c);S_FLIGHT::QAB1(B)
      • K(c);P-FLIGHT,P_SPINP(a)::QAR1(B)
      • P(a);XB(C)::QAB1(B)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(b);OGATEB,SBLOCK::QAR(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).