MESON Chess Problem Database

Problem Display
PID: 120713 (2qRR2K/8/rN5B/3n4/1Qp1n1B1/p2k4/5pP1/3b1r2 w - - 0 1)

Sandegren, VO

Source?, 0000

2qRR2K/8/rN5B/3n4/1Qp1n1B1/p2k4/5pP1/3b1r2

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Rxd5#
    • 1...Qxg4
      • 2.Qxc4#
    • 1...Qf5
      • 2.Qxc4#
    • 1...Qe6
      • 2.Qxc4#
    • 1...Qb7
      • 2.Qxc4#
    • 1...Qd7
      • 2.Qxc4#
    • 1...Qa8
      • 2.Qxc4#
    • 1...Qb8
      • 2.Qxc4#
    • 1...Qxd8
      • 2.Qxc4#
    • 1...Bc2
      • 2.Rxd5#
    • 1...Sd2
      • 2.Qxd2#
    • 1...Sg3
      • 2.Qd2#
    • 1...Sc5
      • 2.Qd2#
      • 2.Qxc4#
    • 1...Sd6
      • 2.Qd2#
    • 1...Sf6
      • 2.Qd2#
    • 1...c3
      • 2.Qxe4#
  • Keys
    • 1.Bf5!
      • threat
        • 2.Qd2#
      • 1...Kc2
        • 2.Bxe4#
      • 1...Ke2
        • 2.Qd2#
      • 1...Kd4
        • 2.Rxd5#
      • 1...Qxf5
        • 2.Qxc4#
      • 1...c3
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • K(e);P-FLIGHT,P_SPINP(f)::R1(F),XS(h)
    • Q(j);N_GUARD,XB(C)::QAB1(B),XP(f)
    • Q(j);N_GUARD::QAB1(B),XP(f)
    • Q(j);N_GUARD,N_SPINS(h)::QAB1(B),XP(f)
    • Q(j);N_GUARD,N_SPINS(h),P_PINR(G),XR(F)::QAB1(B),XP(f)
    • B(a);SBLOCK::R(F),XS(h)
    • S(g);N_GUARD::QAR1(B),XS(g)
    • S(g);N_GUARD::QAR1(B)
    • S(g);N_GUARD,N_SPINS(h)::QAR1(B)
    • P(f);OGATE,SBLOCK::QAB1(B),XS(g)
  • Actual
    • B(C);N_PINS(h),P_PINS(g)
    • Threat
      • QAR1(B)
    • Vars
      • K(e);S_FLIGHT::B(C),XS(g)
      • K(e);S_FLIGHT::QAR1(B)
      • K(e);N_SPINS(g),P-FLIGHT,P_SPINP(f),P_SPINS(h)::R1(F),XS(h)
      • Q(j);N_GUARD,N_SPINS(g),P_SPINS(h),XB(C)::QAB1(B),XP(f)
      • P(f);OGATE,SBLOCK::QAB1(B),XS(g)
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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).