MESON Chess Problem Database

Problem Display
PID: 222601 (8/5ppB/4p1n1/3Rqk1K/7n/Q7/1B6/8 w - - 0 1)

Vansittart, Cyril Bexley

Nuova Rivista degli Scacchi, 1884

8/5ppB/4p1n1/3Rqk1K/7n/Q7/1B6/8

#2

5 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qxf3#
  • Tries
    • 1.Bxe5?
      • threat
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...exd5!
    • 1.Rxe5+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kf6!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qxe5#
      • 1...Ke4+
        • 2.Rxe5#
      • 1...Kf6+
        • 2.Qg5#
      • 1...Qxd5
        • 2.Qg4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...f6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR2(B),XS(a)
  • Tries
    • Try
      • B(A);XQ(b)
      • Threat
        • QAB(B)
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
      • Refutation
        • P(d);XR(C)
    • Try
      • R(C);CHECK,XQ(b)
      • Vars
        • K(c);N_SPINS(e),P-FLIGHT::QAB1(B)
      • Refutation
        • K(c);N_SPINS(e),P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XQ(b)
    • Vars
      • K(c);CHECK,N_SPINQ(b),S_FLIGHT::R1(C),XQ(b)
      • K(c);CHECK,N_SPINS(e),P-FLIGHT::QAB1(B)
      • Q(b);N_SPINQ(b),XR(C)::QAB1(B)
      • S(a);N_GUARD::QAR2(B),XS(a)
      • P(f);SBLOCK::QAB1(B)
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).