MESON Chess Problem Database

Problem Display
PID: 28317 (1R2n1BN/2npk3/p2r2RK/B1Q5/8/8/8/8 w - - 0 1)

Mari, Alberto

Die Schwalbe, 1928

1R2n1BN/2npk3/p2r2RK/B1Q5/8/8/8/8

#2

7 + 6

3242 BCPS Rapid Solving (Cheltenham) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qxd6#
    • 1...Sf6
      • 2.Rg7#
    • 1...Sg7
      • 2.Qxd6#
  • Tries
    • 1.Bxc7?
      • 1...Kf8
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...Sxc7
        • 2.Qxd6#
      • 1...Sf6
        • 2.Bxd6#
        • 2.Rg7#
        • 2.Qxd6#
      • 1...Sg7
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...a5!
    • 1.Bf7?
      • 1...Kf8
        • 2.Qxd6#
      • 1...Sb5
        • 2.Rxe8#
      • 1...Sd5
        • 2.Rxe8#
      • 1...Se6
        • 2.Rxe8#
      • 1...Sa8
        • 2.Rxe8#
      • 1...Sg7
        • 2.Qxd6#
      • 1...Sf6!
    • 1.Rxd6?
      • threat
        • 2.Sg6#
        • 2.Re6#
      • 1...Sxd6
        • 2.Qg5#
      • 1...Se6
        • 2.Rxe6#
      • 1...Kf8!
  • Keys
    • 1.Rf6!
      • 1...Kxf6
        • 2.Qg5#
      • 1...Sxf6
        • 2.Sg6#
      • 1...Sb5
        • 2.Bd8#
      • 1...Sd5
        • 2.Bd8#
      • 1...Se6
        • 2.Rf7#
      • 1...Sa8
        • 2.Bd8#
      • 1...Sg7
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(e);P_SPINS(f),S_FLIGHT::QAB(B),XR(b)
    • S(f);N_PINR(C),SBLOCK::R(C)
    • S(f);N_GUARD::QAB1(B),XR(b)
  • Tries
    • Try
      • B(A);XS(c)
      • Vars
        • S(f);N_GUARD,XB(A)::QAB1(B),XR(b)
      • Refutation
        • P(a);
    • Try
      • B(F);
      • Vars
        • K(e);P_SPINS(f),S_FLIGHT::QAB(B),XR(b)
        • S(c);N_GUARD::R1(E),XS(f)
        • S(c);N_GUARD,N_PINR(C)::R1(E),XS(f)
        • S(f);N_GUARD::QAB1(B),XR(b)
      • Refutation
        • S(f);N_PINR(C)
    • Try
      • R(C);N_SPINR(C),XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);N_GUARD,P_SPINS(f),SBLOCK,XR(C)::QAB(B)
        • S(c);::QAB(B)+R(C),DCHECK,XS(c)
      • Refutation
        • K(e);P_SPINS(f),S_FLIGHT
  • Actual
    • R(C);
    • Vars
      • K(e);N_SPINR(b),OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • S(f);SBLOCK,XR(C)::S(G)
      • S(c);OGATE::B(A)
      • S(c);N_PINR(C),SBLOCK::R1(C)
      • S(f);N_GUARD::QAB1(B),XR(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).