MESON Chess Problem Database

Problem Display
PID: 109187 (8/1p1Q2p1/2rp4/1R2p3/P1k2r1R/4BP2/1K1P4/3B1b2 w - - 0 1)

Pollastrelli, G

Il Littorale, 1931

8/1p1Q2p1/2rp4/1R2p3/P1k2r1R/4BP2/1K1P4/3B1b2

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Bxe2#
    • 1...Bg2
      • 2.Be2#
    • 1...Bd3
      • 2.Bb3#
    • 1...Bh3
      • 2.Be2#
    • 1...d5
      • 2.Qxd5#
  • Tries
    • 1.Qh3?
      • threat
        • 2.Qxf1#
      • 1...Kd3
        • 2.Qxf1#
      • 1...Bxh3
        • 2.Be2#
      • 1...Be2
        • 2.Bxe2#
      • 1...Bg2
        • 2.Be2#
      • 1...Bd3
        • 2.Bb3#
      • 1...Rc5!
    • 1.Qxc6+?
      • 1...Kd3
        • 2.Rb3#
        • 2.Qc2#
        • 2.Qc3#
      • 1...bxc6!
    • 1.Qe6+?
      • 1...d5
        • 2.Qxd5#
      • 1...Kd3!
    • 1.Qf7+?
      • 1...d5
        • 2.Qxd5#
      • 1...Kd3!
    • 1.d3+?
      • 1...Bxd3
        • 2.Bb3#
      • 1...Kxd3!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Bb3#
        • 2.Qc2#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rc5
        • 2.Bb3#
      • 1...e4
        • 2.Qd5#
      • 1...Bd3
        • 2.Bb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::B(A),XB(a)
    • B(a);N_GUARD::B(A)
    • B(a);SBLOCK::B(A)
    • P(f);OGATE::QAB1(I),XP(f)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAB(I),XB(a)
      • Vars
        • K(b);N_SPINR(c),S_FLIGHT::QAB(I),XB(a)
        • B(a);N_GUARD,XQ(I)::B(A)
        • B(a);N_GUARD::B(A),XB(a)
        • B(a);N_GUARD::B(A)
        • B(a);SBLOCK::B(A)
      • Refutation
        • R(e);
    • Try
      • Q(I);CHECK,XR(e)
      • Refutation
        • P(g);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAB1(I),XP(f)
      • Refutation
        • K(b);N_SPINR(c),S_FLIGHT
    • Try
      • Q(I);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAB1(I),XP(f)
      • Refutation
        • K(b);N_SPINR(c),S_FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • B(a);SBLOCK,XP(C)::B(A)
      • Refutation
        • K(b);N_SPINR(c),P_SPINP(f),S_FLIGHT,XP(C)
  • Actual
    • Q(I);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);N_GUARD::QAR2(I),XR(c)
      • R(e);::B(A)
      • P(d);N_SPINR(c),OGATE::QAB1(I)
      • B(a);::B(A)
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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).