MESON Chess Problem Database

Problem Display
PID: 52079 (3R4/B2p4/2B2K2/2P2P2/b2k1pP1/2p1N1pR/3p1N2/3Q2n1 w - - 0 1)

Prins, Hendrik

2nd Prize, US Problem Bulletin, 1991

3R4/B2p4/2B2K2/2P2P2/b2k1pP1/2p1N1pR/3p1N2/3Q2n1

#2

11 + 8

4827 FIDE Album (1989-1991) 1997

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qxd2#
    • 1...gxf2
      • 2.Rxd7#
    • 1...g2
      • 2.Rxd7#
      • 2.Qxa4#
    • 1...fxe3
      • 2.Qxa4#
    • 1...d5
      • 2.cxd5 ep#
    • 1...d6
      • 2.cxd6#
  • Tries
    • 1.Be4?
      • threat
        • 2.c6#
      • 1...Kxe3
        • 2.c6#
      • 1...gxf2
        • 2.Qxa4#
      • 1...fxe3
        • 2.Qxa4#
      • 1...c2
        • 2.Qxd2#
      • 1...Bc6!
    • 1.Bxd7?
      • threat
        • 2.c6#
      • 1...Kxe3
        • 2.c6#
      • 1...gxf2
        • 2.Bc6#
      • 1...fxe3
        • 2.Bb5#
      • 1...c2
        • 2.Qxd2#
      • 1...Bc6!
    • 1.Qe2?
      • threat
        • 2.Rxd7#
        • 2.Qd3#
      • 1...Bxc6
        • 2.Qd3#
      • 1...gxf2
        • 2.Rxd7#
        • 2.Qc4#
      • 1...c2
        • 2.Qd3#
        • 2.Qxd2#
      • 1...d1Q
        • 2.Rxd7#
      • 1...d1R
        • 2.Rxd7#
      • 1...Bc2
        • 2.Sxc2#
        • 2.Rxd7#
      • 1...Bb3
        • 2.Qd3#
      • 1...Bb5
        • 2.Sc2#
        • 2.Rxd7#
      • 1...d5
        • 2.Rxd5#
        • 2.Qd3#
        • 2.cxd5 ep#
      • 1...d6
        • 2.Rxd6#
        • 2.Qd3#
        • 2.cxd6#
      • 1...Sxe2!
  • Keys
    • 1.Bb5!
      • threat
        • 2.c6#
      • 1...Kxe3
        • 2.c6#
      • 1...gxf2
        • 2.Qxa4#
      • 1...fxe3
        • 2.Rxd7#
      • 1...c2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • P(c);N_GUARD::QAR2(A),XP(b)
    • P(d);XS(B)::R(K),XP(h)
    • P(g);SBLOCK,XS(C)::QAR(A),XB(e)
    • P(h);OGATE::B(J)+P(F),XP(h),EP
    • P(h);OGATE::B(J)+P(F),XP(h)
  • Tries
    • Try
      • B(H);
      • Threat
        • B(J)+P(F)
      • Vars
        • K(f);N_SPINP(b),P_SPINP(d),S_FLIGHT,XS(C)::B(J)+P(F)
        • P(d);XS(B)::QAR(A),XB(e)
        • P(g);SBLOCK,XS(C)::QAR(A),XB(e)
        • P(c);N_GUARD::QAR2(A),XP(b)
      • Refutation
        • B(e);
    • Try
      • B(H);XP(h)
      • Threat
        • B(J)+P(F)
      • Vars
        • K(f);N_SPINP(b),P_SPINP(d),S_FLIGHT,XS(C)::B(J)+P(F)
        • P(d);XS(B)::R(K)+B(H)
        • P(g);SBLOCK,XS(C)::R(K)+B(H)
        • P(c);N_GUARD::QAR2(A),XP(b)
      • Refutation
        • B(e);
    • Try
      • Q(A);N_PINP(b),P_PINP(h)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);XB(H)::QAR1(A)
        • P(b);::R(K),XP(h)
        • B(e);::QAR1(A)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • B(H);
    • Threat
      • B(J)+P(F)
    • Vars
      • K(f);N_SPINP(b),P_SPINP(d),S_FLIGHT,XS(C)::B(J)+P(F)
      • P(d);XS(B)::QAR(A),XB(e)
      • P(g);SBLOCK,XS(C)::R(K),XP(h)
      • P(c);N_GUARD::QAR2(A),XP(b)
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).