Problem Display
PID: 121460 (8/3NQ3/7p/4Pp1P/2Bpk3/8/3P2P1/4K3 w - - 0 1)

Pradignat, Emile Leonard

La Strategie, 1907

8/3NQ3/7p/4Pp1P/2Bpk3/8/3P2P1/4K3

#2

8 + 4


6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION


  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qh4#
    • 1...f4
      • 2.Qh7#
  • Tries
    • 1.Kd1?
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Qh7#
      • 1...d3!
    • 1.Kf1?
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Qh7#
      • 1...d3!
    • 1.Ke2?
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Qh7#
      • 1...d3+!
    • 1.Kf2?
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Qh7#
      • 1...d3!
    • 1.Ba2?
      • 1...Kf4
        • 2.Qh4#
      • 1...d3
        • 2.Qb4#
      • 1...f4
        • 2.Qh7#
      • 1...Kd3!
    • 1.Bd3+?
      • 1...Kf4
        • 2.Qh4#
      • 1...Kd5
        • 2.Qd6#
      • 1...Kxd3!
    • 1.Be6?
      • 1...Kf4
        • 2.Qh4#
      • 1...d3
        • 2.Qb4#
      • 1...f4
        • 2.Qh7#
      • 1...Kd3!
    • 1.Bg8?
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Qh7#
      • 1...d3
        • 2.Qb4#
      • 1...Kd3!
    • 1.Qg5?
      • threat
        • 2.d3#
      • 1...d3
        • 2.Qe3#
      • 1...f4
        • 2.Sc5#
        • 2.Sf6#
        • 2.Qg6#
      • 1...hxg5!
    • 1.Qf6?
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Sc5#
        • 2.Qg6#
      • 1...d3!
    • 1.e6?
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Qh7#
      • 1...d3!
  • Keys
    • 1.Bb3!
      • 1...Kd3
        • 2.Sc5#
      • 1...Kf4
        • 2.Qh4#
      • 1...d3
        • 2.Qb4#
      • 1...f4
        • 2.Qh7#

Anticipated by 53052(1893)

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(H)
    • P(c);OGATEB,SBLOCK::QAB(H)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • P(c);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • P(a);
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • P(c);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • P(a);
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • P(c);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • P(a);CHECK
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • P(c);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • P(a);
    • Try
      • B(D);
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • P(a);OGATEB,SBLOCK::QAR(H)
        • P(c);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • K(b);S_FLIGHT::QAR1(H)
      • Refutation
        • K(b);S_FLIGHT,XB(D)
    • Try
      • B(D);
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • P(a);OGATEB,SBLOCK::QAR(H)
        • P(c);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • P(c);OGATEB,SBLOCK::QAB(H)
        • P(a);OGATEB,SBLOCK::QAR(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • P(B)
      • Vars
        • P(a);N_GUARD::QAR1(H)
      • Refutation
        • P(d);XQ(H)
    • Try
      • Q(H);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR2(H)
      • Refutation
        • P(a);
    • Try
      • P(E);
      • Vars
        • K(b);P-FLIGHT::QAR2(H)
        • P(c);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • P(a);
  • Actual
    • B(D);
    • Vars
      • K(b);S_FLIGHT::S(G)
      • K(b);P-FLIGHT::QAR2(H)
      • P(a);OGATEB,SBLOCK::QAR(H)
      • P(c);OGATEB,SBLOCK::QAB(H)


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).