MESON Chess Problem Database

Problem Display
PID: 150546 (8/2BQp3/p3p3/Kp1N1p2/1Ppkp3/R1n1n3/2P1P3/8 w - - 0 1)

Hjelle, David

Springaren, 1965

8/2BQp3/p3p3/Kp1N1p2/1Ppkp3/R1n1n3/2P1P3/8

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sxe3#
    • 1...Scd1
      • 2.Sxe3#
    • 1...Sa2
      • 2.Sxe3#
    • 1...Sxe2
      • 2.Sxe3#
    • 1...Sa4
      • 2.Sxe3#
    • 1...Scxd5
      • 2.c3#
    • 1...e5
      • 2.Bb6#
  • Tries
    • 1.Sf4+?
      • 1...Scd5
        • 2.Sxe6#
        • 2.c3#
      • 1...Sed5!
    • 1.Sb6+?
      • 1...Scd5
        • 2.c3#
      • 1...Sed5!
    • 1.Sf6+?
      • 1...Scd5
        • 2.c3#
      • 1...Sed5!
    • 1.Sxe7+?
      • 1...Scd5
        • 2.Sc6#
        • 2.c3#
      • 1...Sed5!
    • 1.Qxe6?
      • threat
        • 2.Be5#
        • 2.Bb6#
        • 2.Qe5#
      • 1...Scxd5
        • 2.Be5#
        • 2.Qe5#
      • 1...Sa4
        • 2.Be5#
        • 2.Qe5#
      • 1...Sg4
        • 2.Bb6#
      • 1...Sexd5!
    • 1.Qd6?
      • threat
        • 2.Bb6#
        • 2.Qc5#
        • 2.Qe5#
      • 1...Sexd5
        • 2.Bb6#
        • 2.Qc5#
      • 1...Sa4
        • 2.Qe5#
      • 1...Sg4
        • 2.Bb6#
        • 2.Qc5#
      • 1...e5
        • 2.Bb6#
        • 2.Qc5#
        • 2.Qxe5#
      • 1...exd6!
    • 1.Qxe7?
      • threat
        • 2.Qc5#
      • 1...Kxd5
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qd7#
      • 1...Sa4!
  • Keys
    • 1.Bf4!
      • 1...Sxe2
        • 2.Sxe3#
      • 1...Scxd5
        • 2.c3#
      • 1...Sxc2
        • 2.Sxc3#
      • 1...Sexd5
        • 2.e3#
      • 1...exd5
        • 2.Qa7#
      • 1...Sb1
        • 2.Sxe3#
      • 1...Scd1
        • 2.Sxe3#
      • 1...Sa2
        • 2.Sxe3#
      • 1...Sa4
        • 2.Sxe3#
      • 1...Sed1
        • 2.Sxc3#
      • 1...Sf1
        • 2.Sxc3#
      • 1...Sg2
        • 2.Sxc3#
      • 1...Sg4
        • 2.Sxc3#
      • 1...e5
        • 2.Bxe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR(H)+S(F),XS(b)
    • S(a);N_GUARD,XP(B)::QAR(H)+S(F),XS(b)
    • S(a);OGATE,P_SPINS(a),XS(F)::P(A)
    • P(i);SBLOCK::B(G)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • S(F);CHECK
      • Vars
        • S(a);OGATE,P_SPINS(a)::P(A)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • S(F);CHECK
      • Vars
        • S(a);OGATE,P_SPINS(a)::P(A)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • S(F);CHECK,XP(j)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(H);XP(i)
      • Threat
        • DUALS(3)
      • Vars
        • S(b);::B(G)
      • Refutation
        • S(b);XS(F)
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);::QAB1(H)
      • Refutation
        • P(j);XQ(H)
    • Try
      • Q(H);XP(j)
      • Threat
        • QAB1(H)
      • Refutation
        • S(a);
  • Actual
    • B(G);
    • Vars
      • S(a);N_GUARD,XP(B)::QAR(H)+S(F),XS(b)
      • S(a);OGATE,P_SPINS(a),XS(F)::P(A)
      • S(b);N_GUARD,XP(A)::QAR(H)+S(F),XS(a)
      • S(b);OGATE,P_SPINS(b),XS(F)::P(B)
      • P(i);P_SPINP(i),SBLOCK,XS(F)::QAB(H)
      • S(a);N_GUARD::QAR(H)+S(F),XS(b)
      • S(b);N_GUARD::QAR(H)+S(F),XS(a)
      • P(i);SBLOCK::B(G),XS(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).