MESON Chess Problem Database

Problem Display
PID: 223664 (6Q1/8/8/BNK2R2/8/3P4/N2npP2/1B1k4 w - - 0 1)

Chocolous, Jiri

Oesterreichische Lesehalle, 1887

6Q1/8/8/BNK2R2/8/3P4/N2npP2/1B1k4

#2

9 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qg1#
    • 1...Sxb1
      • 2.Qb3#
    • 1...Sf1
      • 2.Qb3#
    • 1...Sb3+
      • 2.Qxb3#
    • 1...Sf3
      • 2.Qb3#
    • 1...e1Q
      • 2.Sbc3#
    • 1...e1S
      • 2.Sbc3#
    • 1...e1B
      • 2.Sbc3#
    • 1...e1R
      • 2.Sbc3#
  • Tries
    • 1.Kb6?
      • 1...Ke1
        • 2.Qg1#
      • 1...Sxb1
        • 2.Qb3#
      • 1...e1Q
        • 2.Sbc3#
      • 1...e1S
        • 2.Sbc3#
      • 1...e1B
        • 2.Sbc3#
      • 1...e1R
        • 2.Sbc3#
      • 1...Sf1
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sf3
        • 2.Qb3#
      • 1...Se4
        • 2.Qb3#
      • 1...Sc4+!
    • 1.Kc6?
      • 1...Ke1
        • 2.Qg1#
      • 1...Sxb1
        • 2.Qb3#
      • 1...e1Q
        • 2.Sbc3#
      • 1...e1S
        • 2.Sbc3#
      • 1...e1B
        • 2.Sbc3#
      • 1...e1R
        • 2.Sbc3#
      • 1...Sf1
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sf3
        • 2.Qb3#
      • 1...Se4
        • 2.Qb3#
      • 1...Sc4!
    • 1.Bc2+?
      • 1...Ke1
        • 2.Qg1#
      • 1...Kxc2!
    • 1.Qg1+?
      • 1...e1Q
        • 2.Sbc3#
      • 1...e1S
        • 2.Sbc3#
      • 1...e1B
        • 2.Sbc3#
      • 1...e1R
        • 2.Sbc3#
      • 1...Sf1!
  • Keys
    • 1.Qd5!
      • 1...Sb3+
        • 2.Qxb3#
      • 1...Se4+
        • 2.dxe4#
      • 1...Ke1
        • 2.Qh1#
      • 1...Sxb1
        • 2.Qb3#
      • 1...e1Q
        • 2.Sbc3#
      • 1...e1S
        • 2.Sbc3#
      • 1...e1B
        • 2.Sbc3#
      • 1...e1R
        • 2.Sbc3#
      • 1...Sc4
        • 2.dxc4#
      • 1...Sf1
        • 2.Qb3#
      • 1...Sf3
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINS(b)::QAR2(I)
    • S(b);N_GUARD,XB(A)::QAB(I)
    • S(b);N_GUARD::QAB(I)
    • S(b);CHECK,N_GUARD::QAB(I),XS(b)
    • P(c);SBLOCK::S(F)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAR2(I)
        • S(b);N_GUARD,XB(A)::QAB(I)
        • P(c);SBLOCK::S(F)
        • S(b);N_GUARD::QAB(I)
        • S(b);N_GUARD::QAB(I),XS(b)
      • Refutation
        • S(b);CHECK
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAR2(I)
        • S(b);N_GUARD,XB(A)::QAB(I)
        • P(c);SBLOCK::S(F)
        • S(b);N_GUARD::QAB(I)
        • S(b);N_GUARD::QAB(I),XS(b)
      • Refutation
        • S(b);
    • Try
      • B(A);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAR2(I)
      • Refutation
        • K(a);S_FLIGHT,XB(A)
    • Try
      • Q(I);CHECK
      • Vars
        • P(c);P_SPINQ(c)::S(F)
        • P(c);P_SPINS(c)::S(F)
        • P(c);P_SPINB(c)::S(F)
        • P(c);P_SPINR(c)::S(F)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • Q(I);
    • Vars
      • S(b);CHECK,N_GUARD::QAB(I),XS(b)
      • S(b);CHECK,OGATE::QAR(I)+P(D),XS(b)
      • K(a);P-FLIGHT,P_SPINS(b)::QAR(I)
      • S(b);N_GUARD,XB(A)::QAB(I)
      • P(c);SBLOCK::S(F)
      • S(b);OGATE::QAR(I)+P(D),XS(b)
      • S(b);N_GUARD::QAB(I)
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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).