MESON Chess Problem Database

Problem Display
PID: 100952 (2R5/1ppr1PPK/2kp4/Q3nR2/pB2P3/r4B2/4N3/bb6 w - - 0 1)

Fontana, Alessandro

Good Companions, 1919

2R5/1ppr1PPK/2kp4/Q3nR2/pB2P3/r4B2/4N3/bb6

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Sd4#
    • 1...Rd8
      • 2.Rxc7#
    • 1...Bd4
      • 2.Sxd4#
    • 1...Sd3
      • 2.Qb5#
    • 1...Sxf3
      • 2.Qb5#
    • 1...Sc4
      • 2.Qb5#
    • 1...Sg4
      • 2.Qb5#
    • 1...Sg6
      • 2.Qb5#
    • 1...Sxf7
      • 2.Qb5#
    • 1...d5
      • 2.Qc5#
    • 1...b5
      • 2.Qa6#
    • 1...b6
      • 2.Qd5#
  • Tries
    • 1.Qxc7+?
      • 1...Kb5
        • 2.Qa5#
      • 1...Rxc7!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Qc5#
      • 1...Bxe4+
        • 2.Bxe4#
      • 1...Rxf7
        • 2.Rxd6#
      • 1...Re7
        • 2.Rxd6#
      • 1...Rd8
        • 2.Rxc7#
      • 1...b5
        • 2.Qa6#
      • 1...b6
        • 2.Qd5#
      • 1...Rc3
        • 2.Sd4#
      • 1...Bd4
        • 2.Sxd4#
      • 1...Sd3
        • 2.e5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(c);S_CUTB(a)::S(A)
    • R(j);N_GUARD::R1(J),XP(i)
    • B(a);N_GUARD::S(A),XB(a)
    • S(e);::QAB1(E)
    • S(e);XB(B)::QAB1(E)
    • S(e);XP(G)::QAB1(E)
    • P(g);N_GUARD::QAR1(E)
    • P(h);N_GUARD::QAR2(E)
    • P(h);SBLOCK::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK,XP(i)
      • Vars
        • K(f);P_SPINS(e),S_FLIGHT::QAR1(E)
      • Refutation
        • R(j);P_SPINR(j),XQ(E)
  • Actual
    • R(F);N_PINP(i),P_PINP(g),P_SPINP(D)
    • Threat
      • QAR1(E)
    • Vars
      • B(b);CHECK,OGATE,P_SPINB(b),XP(D)::B(B),XB(b)
      • R(j);N_GUARD,XP(G)::R1(F),XP(g)
      • R(j);N_GUARD::R1(F),XP(g)
      • R(j);N_GUARD::R1(J),XP(i)
      • P(h);N_GUARD::QAR2(E)
      • P(h);SBLOCK::QAB1(E)
      • R(c);S_CUTB(a)::S(A)
      • B(a);N_GUARD::S(A),XB(a)
      • S(e);N_PINP(D)::B(B)+P(D)
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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).