MESON Chess Problem Database

Problem Display
PID: 224618 (3N4/4n3/8/2Pk2p1/1P4N1/2P2n2/K1R1P3/1B3Q1b w - - 0 1)

Silvera, Arthur P

Sunny South, 1888

3N4/4n3/8/2Pk2p1/1P4N1/2P2n2/K1R1P3/1B3Q1b

#2

10 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.e4#
  • Tries
    • 1.Sf6+?
      • 1...Kc4
        • 2.exf3#
        • 2.e3#
        • 2.e4#
      • 1...Ke5!
    • 1.Rd2+?
      • 1...Sxd2
        • 2.Qf7#
      • 1...Sd4
        • 2.Rxd4#
        • 2.Qf7#
      • 1...Kc4!
    • 1.Qxf3+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Bxf3!
  • Keys
    • 1.Rc1!
      • threat
        • 2.e4#
      • 1...Kc4
        • 2.e4#
      • 1...Se1
        • 2.Qf7#
      • 1...Sg1
        • 2.Qf7#
      • 1...Sd2
        • 2.Qf7#
      • 1...Sh2
        • 2.Qf7#
      • 1...Sd4
        • 2.c4#
      • 1...Sh4
        • 2.Qf7#
      • 1...Se5
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(B)+P(E)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • S(b);OGATE,XR(D)::QAB(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK,XS(b)
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
      • Refutation
        • B(a);XQ(B)
  • Actual
    • R(D);
    • Threat
      • P(E)
    • Vars
      • K(c);S_FLIGHT::QAB(B)+P(E)
      • S(b);OGATE::QAB(B)
      • S(b);SBLOCK::P(F)
      • S(b);SBLOCK::S(H)
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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).