MESON Chess Problem Database

Problem Display
PID: 183175 (2r3r1/2p2QpB/4R2n/1p6/1P1k1P2/N4p2/5b2/3K4 w - - 0 1)

Charvat, Prokop

Pravo lidu, 1907

2r3r1/2p2QpB/4R2n/1p6/1P1k1P2/N4p2/5b2/3K4

#2

7 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qd7#
  • Tries
    • 1.Sc2+?
      • 1...Kc4
        • 2.Rc6#
      • 1...Kd5
        • 2.Rxh6#
      • 1...Kc3!
    • 1.Sxb5+?
      • 1...Kd5
        • 2.Rd6#
        • 2.Rxh6#
      • 1...Kc4!
    • 1.Re4+?
      • 1...Kd3
        • 2.Qb3#
      • 1...Kc3!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Be4#
        • 2.Qe5#
      • 1...gxf6!
    • 1.Qxg7+?
      • 1...Kd5
        • 2.Qe5#
        • 2.Qd7#
      • 1...Rxg7!
  • Keys
    • 1.Re3!
      • threat
        • 2.Sc2#
        • 2.Rd3#
      • 1...Kxe3
        • 2.Sc2#
      • 1...Bxe3
        • 2.Sxb5#
      • 1...Sxf7
        • 2.Rd3#
      • 1...Sf5
        • 2.Sc2#
      • 1...g6
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(c);P-FLIGHT::QAR2(F)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(F)+R(E),DCHECK
        • K(c);P-FLIGHT::QAB(F)+R(E),XS(e)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(B);CHECK,XP(d)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • P(g);XQ(F)
    • Try
      • Q(F);CHECK,XP(g)
      • Refutation
        • R(i);XQ(F)
  • Actual
    • R(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);S_FLIGHT,XR(E)::S(B)
      • B(a);SBLOCK,XR(E)::S(B),XP(d)
      • S(e);XQ(F)::R1(E)
      • S(e);::S(B)
      • P(g);::S(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).