MESON Chess Problem Database

Problem Display
PID: 18617 (3b4/1K1Q4/p2p1P2/Rn2k1Pp/2p2p2/2Pp1B2/4nBpN/4R1q1 w - - 0 1)

Barnes, Barry Peter

1st Prize=, Die Schwalbe, 1957

3b4/1K1Q4/p2p1P2/Rn2k1Pp/2p2p2/2Pp1B2/4nBpN/4R1q1

#2

10 + 12

3147 Chess Problems: Introduction to an Art 1963
4199 Barnes about Chess Problems 2001
136 Problem Observer 2005
136 Problem Observer 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh2
      • 2.Bd4#
    • 1...Qf1
      • 2.Bd4#
    • 1...Qh1
      • 2.Bd4#
    • 1...d2
      • 2.Rxe2#
    • 1...h4
      • 2.Sg4#
    • 1...d5
      • 2.Qxd5#
  • Tries
    • 1.Bg4?
      • threat
        • 2.Qf5#
        • 2.Qe6#
      • 1...Ke4
        • 2.Qf5#
        • 2.Qe6#
      • 1...Kd5
        • 2.Qf5#
        • 2.Qe6#
      • 1...f3
        • 2.Qf5#
      • 1...d5
        • 2.Qe6#
      • 1...hxg4!
    • 1.Bd5?
      • threat
        • 2.Qe6#
      • 1...Kxd5
        • 2.Qf5#
      • 1...Sd4
        • 2.cxd4#
      • 1...Sc7
        • 2.Sf3#
      • 1...f3!
    • 1.Bc6?
      • threat
        • 2.Sf3#
      • 1...Qxh2
        • 2.Bd4#
      • 1...f3
        • 2.Bg3#
      • 1...d5
        • 2.Qxd5#
      • 1...Qxf2!
    • 1.Rxb5+?
      • 1...d5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...axb5!
    • 1.Qf7?
      • threat
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Kf5!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qf5#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Sg3
        • 2.Sf3#
      • 1...Sd4
        • 2.cxd4#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD,XS(C)::B(B)
    • Q(a);N_GUARD::B(B)
    • P(d);N_GUARD::R(A),XS(b)
    • P(i);N_GUARD::S(C)
    • P(k);OGATE::QAR1(J),XP(k)
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAR1(J)
        • P(k);::QAR1(J)
      • Refutation
        • P(i);XB(E)
    • Try
      • B(E);
      • Threat
        • QAR1(J)
      • Vars
        • K(h);N_SPINS(b),P-FLIGHT,P_SPINP(k),P_SPINS(g),XB(E)::QAR2(J)
        • S(g);OGATE::P(D),XS(g)
        • S(g);::S(C)
      • Refutation
        • P(f);
    • Try
      • B(E);
      • Threat
        • S(C)
      • Vars
        • Q(a);N_GUARD,XS(C)::B(B)
        • P(f);OGATEB::B(B)
        • P(k);OGATE::QAR1(J),XP(k)
      • Refutation
        • Q(a);XB(B)
    • Try
      • R(F);CHECK,XS(g)
      • Refutation
        • P(j);XR(F)
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • P(k);::QAR1(J),XP(k)
      • Refutation
        • K(h);N_SPINS(b),P-FLIGHT,P_SPINS(g)
  • Actual
    • B(E);N_PINS(b),P_PINS(g)
    • Threat
      • QAR1(J)
    • Vars
      • K(h);N_SPINS(g),P-FLIGHT,P_SPINS(b),XB(E)::QAR2(J)
      • S(b);::S(C)
      • S(b);OGATE::P(D),XS(b)
      • P(k);N_SPINS(g),OGATE::QAR1(J),XP(k)
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).