MESON Chess Problem Database

Problem Display
PID: 227567 (5QBB/7R/8/8/K7/2P1N3/2pN4/kbb5 w - - 0 1)

Cassinelli, A

El Ajedrez Argentino, 1926

5QBB/7R/8/8/K7/2P1N3/2pN4/kbb5

#2

8 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kb2
      • 2.Qa3#
  • Tries
    • 1.Sb3+?
      • 1...Kb2
        • 2.Qa3#
      • 1...Ka2!
    • 1.Qa3+?
      • 1...Ba2
        • 2.Sxc2#
        • 2.Qxa2#
      • 1...Bxa3!
    • 1.c4+?
      • 1...Ka2
        • 2.c5#
      • 1...Bb2!
  • Keys
    • 1.Rh1!
      • 1...Kb2
        • 2.Qa3#
      • 1...Bxd2
        • 2.Qa3#
      • 1...Ba2
        • 2.c4#
      • 1...Bb2
        • 2.Sxc2#
      • 1...Ba3
        • 2.Qxa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(F)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • B(c);XQ(F)
    • Try
      • P(B);CHECK
      • Vars
        • K(a);P-FLIGHT::B(G)+P(B)
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • R(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(F)
      • B(c);N_GUARD,P_SPINB(b),XS(A)::QAR2(F)
      • B(b);P_SPINB(c),SBLOCK::B(H)+P(B)
      • B(c);P_SPINB(b),SBLOCK::S(C),XP(d)
      • B(c);N_GUARD,P_SPINB(b)::QAR2(F),XB(c)
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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).