MESON Chess Problem Database

Problem Display
PID: 71640 (3B2r1/bN2p1rp/Rq3k2/2Q3pP/2p1p1P1/2p5/B2P2p1/4R1K1 w - - 0 1)

Chicco, Adriano

4/5 Prize, L'Echiquier TT, 1936-1937

3B2r1/bN2p1rp/Rq3k2/2Q3pP/2p1p1P1/2p5/B2P2p1/4R1K1

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Qf5#
  • Tries
    • 1.Kxg2?
      • threat
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kf7
        • 2.Qxe7#
      • 1...Rg6
        • 2.Qxe7#
      • 1...Rf7!
    • 1.Re3?
      • threat
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kf7
        • 2.Qxe7#
      • 1...Rg6
        • 2.Qxe7#
      • 1...Rf7!
    • 1.Rxb6+?
      • 1...Kf7
        • 2.Qxe7#
      • 1...Bxb6!
    • 1.Qd4+?
      • 1...Ke6
        • 2.Bxc4#
      • 1...Kf7!
  • Keys
    • 1.d4!
      • threat
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kf7
        • 2.Qxe7#
      • 1...cxd4 ep
        • 2.Qd4#
      • 1...exd4 ep
        • 2.Qf2#
      • 1...Rg6
        • 2.Qxe7#
      • 1...Rf7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(d);N_PINQ(F)::QAR1(F)
  • Tries
    • Try
      • K(B);N_SPINQ(F),P-FLIGHT,XP(a)
      • Threat
        • QAR1(F)
      • Vars
        • K(g);N_SPINP(i),P-FLIGHT,P_SPINP(c)::QAB1(F)
        • K(g);N_SPINP(i),N_SPINQ(f),P-FLIGHT,P_SPINP(c)::QAR1(F),XP(i)
        • R(j);N_GUARD::QAB1(F),XP(i)
      • Refutation
        • R(j);
    • Try
      • R(A);N_SPINQ(F)
      • Threat
        • QAR1(F)
      • Vars
        • K(g);N_SPINP(i),P-FLIGHT,P_SPINP(c)::QAB1(F)
        • K(g);N_SPINP(i),N_SPINQ(f),P-FLIGHT,P_SPINP(c)::QAR1(F),XP(i)
        • R(j);N_GUARD::QAB1(F),XP(i)
      • Refutation
        • R(j);
    • Try
      • R(H);CHECK,N_SPINQ(F),XQ(f)
      • Vars
        • K(g);N_SPINP(i),P-FLIGHT,P_SPINP(c)::QAR1(F),XP(i)
      • Refutation
        • B(h);P_PINQ(F),XR(H)
    • Try
      • Q(F);CHECK
      • Vars
        • K(g);N_SPINP(i),P-FLIGHT,P_SPINP(c)::B(C),XP(c)
      • Refutation
        • K(g);N_SPINP(i),N_SPINQ(f),P-FLIGHT,P_SPINP(c)
  • Actual
    • P(D);N_SPINQ(F)
    • Threat
      • QAR1(F)
    • Vars
      • K(g);N_SPINP(i),P-FLIGHT,P_SPINP(c)::QAB1(F)
      • K(g);N_SPINP(i),N_SPINQ(f),P-FLIGHT,P_SPINP(c)::QAR1(F),XP(i)
      • P(c);EP,OGATE,P_PINQ(F),XP(D)::QAB(F)
      • P(d);EP,OGATE,P_PINQ(F),XP(D)::QAR(F)
      • R(j);N_GUARD::QAB1(F),XP(i)
      • R(j);SBLOCK::QAB1(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).