MESON Chess Problem Database

Problem Display
PID: 43743 (Bb6/3p4/7p/7Q/3rrk1K/8/5P2/4RR2 w - - 0 1)

Marin y Llovet, Valentin

1st HM., Falkirk Herald, 1926

Bb6/3p4/7p/7Q/3rrk1K/8/5P2/4RR2

#2

6 + 6

20 De Problemist 1930

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Rxe4#
    • 1...Rd2
      • 2.Rxe4#
    • 1...Rd3
      • 2.Rxe4#
    • 1...Rd6
      • 2.Rxe4#
    • 1...Re3
      • 2.fxe3#
    • 1...Re5
      • 2.Qf3#
      • 2.Qg4#
    • 1...Re6
      • 2.Qf3#
      • 2.Qg4#
    • 1...Re7
      • 2.Qf3#
      • 2.Qg4#
    • 1...Re8
      • 2.Qf3#
      • 2.Qg4#
      • 2.Qf7#
    • 1...Be5
      • 2.Qg4#
  • Tries
    • 1.Re3?
      • threat
        • 2.Rf3#
      • 1...Rd3
        • 2.Rxe4#
      • 1...Rxe3!
    • 1.Qg5+?
      • 1...Kf3+
        • 2.Qg4#
      • 1...hxg5+!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qf6#
      • 1...Kf3+
        • 2.Qg4#
      • 1...Ke5+
        • 2.f4#
      • 1...Rd5
        • 2.Qxe4#
      • 1...Rd6
        • 2.Qxe4#
      • 1...Re5
        • 2.Qg4#
      • 1...Re6
        • 2.Qg4#
      • 1...Be5
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::R1(A),XR(b)
    • R(b);OGATE::R(B)+P(C)DCHECK,XR(b)
    • B(f);SBLOCK::QAR1(E)
  • Tries
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • R(a);N_GUARD::R1(A),XR(b)
      • Refutation
        • R(b);XR(A)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);CHECK,P-FLIGHT,P_SPINR(b)::QAB1(E)
      • Refutation
        • P(d);CHECK,XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • K(c);CHECK,P-FLIGHT,P_SPINR(b)::QAB1(E)
      • K(c);CHECK,OGATE,P_SPINR(b),S_FLIGHT::P(C)
      • R(a);N_GUARD::QAR1(E),XR(b)
      • R(b);::QAR1(E)
      • B(f);SBLOCK::QAR1(E)
HTML5 logo

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).