MESON Chess Problem Database

Problem Display
PID: 72365 (2q2QB1/2n5/b2N2Rp/4k1bK/p5p1/r1n5/1N1Rp3/8 w - - 0 1)

Ghirelli, Bruno

Chess, 1953

2q2QB1/2n5/b2N2Rp/4k1bK/p5p1/r1n5/1N1Rp3/8

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qb7
      • 2.Qf5#
    • 1...Qa8
      • 2.Qf5#
    • 1...Qb8
      • 2.Qf5#
    • 1...Qd8
      • 2.Qf5#
    • 1...Qe8
      • 2.Qf5#
    • 1...Bxd2
      • 2.Qf6#
    • 1...Be3
      • 2.Qf6#
    • 1...Bf4
      • 2.Qg7#
      • 2.Qf6#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Bc4
      • 2.Sbxc4#
    • 1...Bb7
      • 2.Sbc4#
    • 1...S3b5
      • 2.Sbc4#
    • 1...Se6
      • 2.Qf5#
  • Tries
    • 1.Rxg5+?
      • 1...Qf5
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...hxg5!
    • 1.Re6+?
      • 1...Sxe6
        • 2.Qf5#
      • 1...Qxe6!
    • 1.Qg7+?
      • 1...Bf6
        • 2.Qxf6#
      • 1...Kf4!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qd4#
      • 1...Bxd2
        • 2.Qf6#
      • 1...Be3
        • 2.Qf6#
      • 1...Bd3
        • 2.Sxd3#
      • 1...Se4
        • 2.Sf7#
      • 1...S3b5
        • 2.Sbc4#
      • 1...S7b5
        • 2.Sd3#
      • 1...Se6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(k);N_GUARD::QAR1(F),XQ(k)
    • Q(k);N_GUARD::QAR1(F)
    • Q(k);N_GUARD,P_PINR(E)::QAR1(F)
    • B(g);N_GUARD,XR(B)::QAB1(F)
    • B(g);N_GUARD::QAB1(F)
    • B(g);N_GUARD::QAB1(F),XB(g)
    • B(h);N_GUARD::S(A),XB(h)
    • B(h);N_GUARD::S(A)
    • S(c);S_CUTB(h)::S(A)
    • S(j);S_CUTQ(k)::QAR1(F)
  • Tries
    • Try
      • R(E);CHECK,XB(g)
      • Refutation
        • P(i);XR(E)
    • Try
      • R(E);CHECK
      • Vars
        • S(j);XR(E)::QAR1(F)
      • Refutation
        • Q(k);XR(E)
    • Try
      • Q(F);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAB1(F),XB(g)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • B(g);N_GUARD,XR(B)::QAB1(F)
      • B(g);N_GUARD::QAB1(F)
      • B(h);N_GUARD::S(A),XB(h)
      • S(c);SBLOCK::S(D)
      • S(c);S_CUTB(h)::S(A)
      • S(j);S_CUTB(h)::S(A)
      • S(j);S_CUTQ(k)::QAR1(F)
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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).