MESON Chess Problem Database

Problem Display
PID: 206673 (8/8/7p/3p3B/8/3k2P1/1Q1N2pN/2B3Kb w - - 0 1)

Harcz, Karoly

Magyar Sakkvilag, 1925

8/8/7p/3p3B/8/3k2P1/1Q1N2pN/2B3Kb

#2

7 + 5

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qc3#
    • 1...d4
      • 2.Qb3#
  • Tries
    • 1.Sb1?
      • 1...Ke4
        • 2.Bg6#
      • 1...d4
        • 2.Qe2#
      • 1...Kc4!
    • 1.Bd1?
      • 1...Ke3
        • 2.Qc3#
      • 1...d4
        • 2.Qa3#
        • 2.Qb3#
      • 1...h5!
    • 1.Be2+?
      • 1...Ke3
        • 2.Qe5#
      • 1...Kxe2!
    • 1.Bf3?
      • 1...Ke3
        • 2.Qc3#
      • 1...d4
        • 2.Qb3#
      • 1...h5!
    • 1.Bg4?
      • 1...Ke3
        • 2.Qc3#
      • 1...d4
        • 2.Qb3#
      • 1...h5!
    • 1.Bg6+?
      • 1...Ke3
        • 2.Sb1#
        • 2.Sdf1#
        • 2.Sb3#
        • 2.Sdf3#
        • 2.Sc4#
        • 2.Qe5#
      • 1...Ke2!
    • 1.Qa3+?
      • 1...Kd4
        • 2.Shf3#
        • 2.Bb2#
      • 1...Kc2!
    • 1.Qc2+?
      • 1...Ke3
        • 2.Sb3#
        • 2.Sdf3#
        • 2.Qc3#
      • 1...Kd4
        • 2.Sdf3#
      • 1...Kxc2!
    • 1.Qb4?
      • 1...Ke3
        • 2.Qc3#
      • 1...d4
        • 2.Qb3#
      • 1...Kc2!
  • Keys
    • 1.Se4!
      • 1...Kc4
        • 2.Be2#
      • 1...Kxe4
        • 2.Bg6#
      • 1...dxe4
        • 2.Be2#
      • 1...d4
        • 2.Qe2#

Anticipated by 23668(1871)

This anticipates 936(1993)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT::QAR2(C)
    • P(d);SBLOCK::QAR2(C)
  • Tries
    • Try
      • S(D);
      • Vars
        • K(c);S_FLIGHT::B(G)
        • P(d);SBLOCK::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(G);
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
      • Refutation
        • P(e);
    • Try
      • B(G);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
      • Refutation
        • K(c);S_FLIGHT,XB(G)
    • Try
      • B(G);
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
        • P(d);SBLOCK::QAR2(C)
      • Refutation
        • P(e);
    • Try
      • B(G);
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
        • P(d);SBLOCK::QAR2(C)
      • Refutation
        • P(e);
    • Try
      • B(G);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::S(D)
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(c);P-FLIGHT::QAR2(C)
        • P(d);SBLOCK::QAR2(C)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(c);S_FLIGHT::B(G)
      • K(c);OGATEB,S_FLIGHT,XS(D)::B(G)
      • P(d);SBLOCK,XS(D)::B(G)
      • P(d);SBLOCK::QAB1(C)
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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).