MESON Chess Problem Database

Problem Display
PID: 64335 (b7/3NR3/1pPpnr2/1Qp2p2/K2k1rn1/5BB1/3P4/3R4 w - - 0 1)

Dobbs, Gilbert S

Tidskrift for Schack, 1910

b7/3NR3/1pPpnr2/1Qp2p2/K2k1rn1/5BB1/3P4/3R4

#2

9 + 10

81 Chess 1946

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Bxf2#
    • 1...Sh2
      • 2.Bf2#
    • 1...Se5
      • 2.Bf2#
    • 1...Sh6
      • 2.Bf2#
    • 1...c4
      • 2.Qd5#
  • Tries
    • 1.Bf2+?
      • 1...Se3
        • 2.Bxe3#
      • 1...Sxf2!
    • 1.Qb2+?
      • 1...Kc4
        • 2.Qc3#
        • 2.d3#
      • 1...Kd3+!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qb2#
      • 1...Kxe5+
        • 2.d4#
      • 1...Rxf3
        • 2.Qc4#
      • 1...Bxc6
        • 2.Sxc6#
      • 1...Sxe5
        • 2.Bf2#
      • 1...dxe5
        • 2.Rd7#
      • 1...Re4
        • 2.Qd3#
        • 2.Qc4#
      • 1...c4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD::B(D),XS(c)
    • S(c);N_GUARD::B(D)
    • P(d);OGATE::QAR1(F)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(D),XS(c)
      • Refutation
        • S(c);XB(D)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);CHECK,P-FLIGHT
  • Actual
    • S(H);
    • Threat
      • QAB(F)
    • Vars
      • K(a);CHECK,OGATE,P_SPINP(d),P_SPINR(b),P_SPINS(h),S_FLIGHT,XS(H)::P(B)
      • R(b);XB(C)::QAR1(F)
      • B(j);P_PINQ(F),XP(G)::S(H),XB(j)
      • S(c);N_GUARD,SBLOCK,XS(H)::B(D)
      • P(g);OGATEB,SBLOCK,XS(H)::R(I)
      • P(d);OGATE::QAR1(F)
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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).