MESON Chess Problem Database

Problem Display
PID: 137663 (8/Nnn2N2/b1Pp1pB1/3k3p/R7/2Pp1Kp1/6P1/4RQB1 w - - 0 1)

le Grand, Henk

Probleemblad, 2010

8/Nnn2N2/b1Pp1pB1/3k3p/R7/2Pp1Kp1/6P1/4RQB1

#2

11 + 9

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Rd4#
    • 1...Sb5
      • 2.c4#
    • 1...Se6
      • 2.Be4#
  • Tries
    • 1.Kxg3?
      • threat
        • 2.Qf3#
        • 2.Qf5#
      • 1...Sc5
        • 2.Rd4#
        • 2.Qf5#
      • 1...f5
        • 2.Qf3#
        • 2.Qxf5#
      • 1...h4+!
    • 1.Kf4?
      • threat
        • 2.Qf3#
      • 1...Sc5
        • 2.Rd4#
      • 1...Se6+!
    • 1.Bb6?
      • threat
        • 2.Rd4#
      • 1...Sb5
        • 2.c4#
      • 1...Se6
        • 2.Be4#
      • 1...Bc4!
    • 1.Re7?
      • threat
        • 2.Be4#
      • 1...Sc5
        • 2.Rd4#
      • 1...f5!
    • 1.Qf2?
      • threat
        • 2.Qd4#
      • 1...Sb5
        • 2.Qa2#
        • 2.c4#
      • 1...Se6
        • 2.Be4#
      • 1...gxf2!
  • Keys
    • 1.Ke3!
      • threat
        • 2.Qf5#
      • 1...Kc5
        • 2.Ke4#
      • 1...Ke6
        • 2.Kd4#
      • 1...f5
        • 2.Qxf5#

Anticipated by 163410(2004)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(h);SBLOCK::R1(G)
    • S(i);S_CUTB(e)::P(E)
    • S(i);SBLOCK::B(I)
  • Tries
    • Try
      • K(F);P-FLIGHT,XP(b)
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);CHECK
    • Try
      • K(F);P-FLIGHT
      • Threat
        • QAB(B)
      • Vars
        • S(h);SBLOCK::R1(G)
      • Refutation
        • S(i);CHECK
    • Try
      • B(C);
      • Threat
        • R1(G)
      • Vars
        • S(i);S_CUTB(e)::P(E)
        • S(i);SBLOCK::B(I)
      • Refutation
        • B(e);
    • Try
      • R(A);
      • Threat
        • B(I)
      • Vars
        • S(h);SBLOCK::R1(G)
      • Refutation
        • P(g);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • S(i);SBLOCK::B(I)
      • Refutation
        • P(b);XQ(B)
  • Actual
    • K(F);P-FLIGHT
    • Threat
      • QAR2(B)
    • Vars
      • K(c);P-FLIGHT::B(C)+K(F)
      • K(c);S_FLIGHT::R(A)+K(F)
      • P(g);::QAR2(B),XP(g)
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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).