MESON Chess Problem Database

Problem Display
PID: 143901 (8/p2r4/K1QP4/Rp2kp1P/3N4/5p2/1B3P2/8 w - - 0 1)

Valle, Giovanni Batista

Source?, 1892

8/p2r4/K1QP4/Rp2kp1P/3N4/5p2/1B3P2/8

#2

8 + 6

14868 Pirnie Collection 2012
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Sxf3+?
      • 1...Ke6
        • 2.Sg5#
      • 1...Kf4!
    • 1.Sxb5+?
      • 1...Ke6
        • 2.Qc4#
      • 1...Kf4!
    • 1.Qxb5+?
      • 1...Ke4
        • 2.Qxf5#
      • 1...Kf4
        • 2.Qxf5#
      • 1...Kxd6
        • 2.Qc5#
        • 2.Qe5#
      • 1...Kf6!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Qxf5#
      • 1...Kf6
        • 2.Sxf3#
      • 1...Kxd5!
    • 1.Qxd7?
      • 1...Ke4
        • 2.Qxf5#
      • 1...Kf4
        • 2.Qxf5#
      • 1...Kf6
        • 2.Sxf3#
        • 2.Se6#
        • 2.Qe7#
      • 1...f4
        • 2.Qe6#
      • 1...Kd5!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qxf5#
      • 1...Kf4
        • 2.Qxf5#
      • 1...Kf6!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Sxb5#
      • 1...Rxd6+
        • 2.Sc6#
      • 1...Ke4
        • 2.Sxb5#
      • 1...Kf4
        • 2.Se6#
      • 1...Kxd6
        • 2.Sxf5#
      • 1...Kf6
        • 2.Sxf3#
      • 1...f4
        • 2.Qe6#

This anticipates 9825(1910)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK,XP(a)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::S(C)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • S(C);CHECK,XP(b)
      • Vars
        • K(c);P-FLIGHT::QAB(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);CHECK,XP(b)
      • Vars
        • K(c);OGATE,P-FLIGHT::QAB1(G),XP(d)
        • K(c);OGATE,S_FLIGHT::QAR1(G),XP(d)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);CHECK,N_PINP(b)
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(G),XP(d)
        • K(c);S_FLIGHT::B(A)+S(C),XP(a)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b),XQ(G)
    • Try
      • Q(G);XR(f)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAB1(G),XP(d)
        • K(c);N_SPINP(b),S_FLIGHT::QAR1(G),XP(d)
        • P(d);SBLOCK::QAR1(G)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(G);CHECK,N_PINP(b)
      • Vars
        • K(c);OGATE,P-FLIGHT::QAB1(G),XP(d)
        • K(c);OGATE,S_FLIGHT::QAR1(G),XP(d)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • B(A)+S(C),XP(b)
    • Vars
      • R(f);CHECK,SBLOCK,XP(H)::B(A)+S(C),DCHECK
      • K(c);N_SPINP(b),P-FLIGHT::QAR(G)+S(C),XP(b)
      • K(c);N_SPINP(b),S_FLIGHT::QAR(G)+S(C),DCHECK
      • K(c);N_SPINP(b),S_FLIGHT,XP(H)::S(C),XP(d)
      • K(c);N_SPINP(b),S_FLIGHT::B(A)+S(C),XP(a)
      • P(d);SBLOCK::QAR1(G)
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).