MESON Chess Problem Database

Problem Display
PID: 62491 (q7/2B5/pp6/3N4/3bk1B1/1Q2p3/K1R5/8 w - - 0 1)

Bivar, ADH

Chess, 1944

q7/2B5/pp6/3N4/3bk1B1/1Q2p3/K1R5/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qf3#
  • Tries
    • 1.Sc3+?
      • 1...Kd3
        • 2.Be2#
      • 1...Bxc3!
    • 1.Qc4?
      • threat
        • 2.Sc3#
        • 2.Sf6#
      • 1...Qc6
        • 2.Sc3#
      • 1...Qd8
        • 2.Sc3#
      • 1...Qf8
        • 2.Sc3#
      • 1...Qh8
        • 2.Sc3#
      • 1...e2
        • 2.Rxe2#
      • 1...Qxd5!
    • 1.Qd3+?
      • 1...Kxd3
        • 2.Bf5#
      • 1...Kxd5!
    • 1.Qxe3+?
      • 1...Kxd5
        • 2.Bf3#
        • 2.Be6#
        • 2.Qf3#
        • 2.Qe6#
      • 1...Bxe3!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Rc5#
      • 1...Qxd5+
        • 2.Rc4#
      • 1...Kd3
        • 2.Bf5#
      • 1...Kxd5
        • 2.Qh1#
      • 1...Ba1
        • 2.Rd2#
      • 1...Bb2
        • 2.Rd2#
      • 1...Bc3
        • 2.Rd2#
      • 1...Bc5
        • 2.Rd2#
      • 1...Be5
        • 2.Rd2#
      • 1...Bf6
        • 2.Rd2#
      • 1...Bg7
        • 2.Rd2#
      • 1...Bh8
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATE::QAB1(C)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);S_FLIGHT::B(D)
      • Refutation
        • B(b);XS(E)
    • Try
      • Q(C);P_PINB(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);::S(E)
        • P(a);OGATEB::R(B),XP(a)
      • Refutation
        • Q(f);P_PINQ(C),XS(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XQ(C)::B(D)
      • Refutation
        • K(c);P_SPINB(b),S_FLIGHT,XS(E)
    • Try
      • Q(C);CHECK,XP(a)
      • Refutation
        • B(b);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+R(B)
    • Vars
      • Q(f);CHECK,SBLOCK,XS(E)::QAB(C)+R(B)
      • K(c);S_FLIGHT::B(D)
      • K(c);S_FLIGHT,XS(E)::QAB(C)
      • B(b);::QAB(C)+R(B)
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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).