MESON Chess Problem Database

Problem Display
PID: 108185 (K6b/p2NN1kp/2Q1R2p/5p1B/1p5p/2p5/5qn1/6B1 w - - 0 1)

Becker, Christopher Bennett

Schakend Nederland, 1979

K6b/p2NN1kp/2Q1R2p/5p1B/1p5p/2p5/5qn1/6B1

#2

7 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Bxd4#
    • 1...Qc5
      • 2.Qxg2#
    • 1...Qb6
      • 2.Qxg2#
    • 1...Qf1
      • 2.Bd4#
    • 1...Qa2
      • 2.Bd4#
    • 1...Qb2
      • 2.Bd4#
    • 1...Qc2
      • 2.Bd4#
    • 1...Qf3
      • 2.Bd4#
  • Tries
    • 1.Sxf5+?
      • 1...Kg8
        • 2.Re8#
        • 2.Qc8#
      • 1...Qxf5!
    • 1.Bxf2?
      • threat
        • 2.Bd4#
        • 2.Qxg2#
      • 1...Se1
        • 2.Bd4#
      • 1...Sf4
        • 2.Bd4#
      • 1...h3
        • 2.Bd4#
      • 1...Se3!
    • 1.Re1?
      • threat
        • 2.Qf6#
      • 1...Qd4
        • 2.Bxd4#
      • 1...Qf3
        • 2.Bd4#
      • 1...Qb6!
    • 1.Rg6+?
      • 1...hxg6
        • 2.Qxg6#
      • 1...Kf7!
    • 1.Rxh6?
      • threat
        • 2.Qf6#
      • 1...Qd4
        • 2.Bxd4#
      • 1...Qf3
        • 2.Bd4#
      • 1...Qb6!
    • 1.Qxg2+?
      • 1...Qg3
        • 2.Bd4#
      • 1...Qxg2+!
    • 1.Qxc3+?
      • 1...Qd4
        • 2.Bxd4#
        • 2.Qxd4#
      • 1...bxc3!
  • Keys
    • 1.Re2!
      • threat
        • 2.Qf6#
      • 1...Qd4
        • 2.Bxd4#
      • 1...Qb6
        • 2.Rxg2#
      • 1...Qf3
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • Q(a);OGATE::B(A),XQ(a)
    • Q(a);N_GUARD::QAR(C),XS(b)
    • Q(a);OGATE::B(A)
    • Q(a);OGATE,P_PINQ(C)::B(A)
  • Tries
    • Try
      • S(F);CHECK,XP(f)
      • Refutation
        • Q(a);XS(F)
    • Try
      • B(A);XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::B(A)
        • P(e);::B(A)
      • Refutation
        • S(b);
    • Try
      • R(D);
      • Threat
        • QAB1(C)
      • Vars
        • Q(a);OGATE::B(A),XQ(a)
        • Q(a);OGATE,P_PINQ(C)::B(A)
      • Refutation
        • Q(a);
    • Try
      • R(D);CHECK
      • Vars
        • P(j);OGATE,XR(D)::QAR1(C),XP(j)
      • Refutation
        • K(i);P-FLIGHT
    • Try
      • R(D);XP(g)
      • Threat
        • QAB1(C)
      • Vars
        • Q(a);OGATE::B(A),XQ(a)
        • Q(a);OGATE,P_PINQ(C)::B(A)
      • Refutation
        • Q(a);
    • Try
      • Q(C);CHECK,XS(b)
      • Vars
        • Q(a);OGATE,P_SPINQ(a)::B(A)
      • Refutation
        • Q(a);CHECK,XQ(C)
    • Try
      • Q(C);CHECK,XP(c)
      • Refutation
        • P(d);XQ(C)
  • Actual
    • R(D);
    • Threat
      • QAB1(C)
    • Vars
      • Q(a);OGATE::B(A),XQ(a)
      • Q(a);OGATE::R(D),XS(b)
      • Q(a);OGATE,P_PINQ(C)::B(A)
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).