MESON Chess Problem Database

Problem Display
PID: 93031 (8/K1Qn4/2P1q3/3b1nP1/2PkP2R/N7/3B1N2/3R4 w - - 0 1)

Eriksson, Finn Olof

Schackspelaren, 1934

8/K1Qn4/2P1q3/3b1nP1/2PkP2R/N7/3B1N2/3R4

#2

11 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Qb6#
  • Tries
    • 1.Qb6+?
      • 1...Ke5
        • 2.Bf4#
      • 1...Sc5
        • 2.Qb2#
      • 1...Sxb6!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Bf4#
      • 1...Ke5
        • 2.Bf4#
      • 1...Qxe4
        • 2.Qxd5#
      • 1...Bxc4
        • 2.Sc2#
      • 1...Bxe4
        • 2.Bc1#
      • 1...Se3
        • 2.Bc3#
      • 1...Sc5
        • 2.Qc3#
      • 1...Se5
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD,SBLOCK::QAB(K)
  • Tries
    • Try
      • Q(K);CHECK
      • Vars
        • K(a);S_FLIGHT::B(B)
        • S(e);P_SPINS(e),SBLOCK::QAB(K)
      • Refutation
        • S(e);XQ(K)
  • Actual
    • Q(K);
    • Threat
      • R(A)+B(B)
    • Vars
      • K(a);P_SPINB(b),S_FLIGHT::B(B)
      • Q(d);N_GUARD,P_SPINQ(d),XP(F)::QAR1(K),XB(b)
      • B(b);SBLOCK,XP(E)::S(D)
      • B(b);P_SPINB(b),XP(F)::R(A)+B(B)
      • S(c);SBLOCK::R(A)+B(B),DCHECK
      • S(e);SBLOCK::QAB1(K)
      • S(e);N_GUARD,SBLOCK::QAB(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).