MESON Chess Problem Database

Problem Display
PID: 202906 (2BqNN2/Kp6/1pp1Rp1r/3k1p1r/1P2p3/1b6/6P1/B4Q2 w - - 0 1)

Rice, John Michael

Zadachi i Etyudi, 2016

2BqNN2/Kp6/1pp1Rp1r/3k1p1r/1P2p3/1b6/6P1/B4Q2

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.Sxc7#
    • 1...Qd6
      • 2.Rxd6#
    • 1...Qxc8
      • 2.Rd6#
    • 1...e3
      • 2.Qd3#
    • 1...c5
      • 2.Bxb7#
  • Tries
    • 1.Rxc6?
      • threat
        • 2.Qb5#
      • 1...Kxc6
        • 2.Bxb7#
      • 1...bxc6
        • 2.Be6#
      • 1...e3
        • 2.Qf3#
      • 1...Qd6
        • 2.Rxd6#
      • 1...Ba4
        • 2.Qc4#
      • 1...Bc4
        • 2.Qxc4#
      • 1...b5
        • 2.Rc5#
        • 2.Qxb5#
      • 1...Qe7!
    • 1.Qb5+?
      • 1...c5
        • 2.Bxb7#
      • 1...cxb5!
  • Keys
    • 1.Rxe4!
      • threat
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qf3#
      • 1...fxe4
        • 2.Be6#
      • 1...c5
        • 2.Bxb7#
      • 1...Rh3
        • 2.Qxf5#
      • 1...Bc2
        • 2.Qc4#
      • 1...Bc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(k);N_GUARD::S(H),XQ(k)
    • Q(k);N_GUARD::R1(E),XQ(k)
    • Q(k);N_GUARD,XB(G)::R1(E)
    • P(b);N_GUARD::QAR2(B)
    • P(g);OGATEB::B(G),XP(j)
  • Tries
    • Try
      • R(E);XP(g)
      • Threat
        • QAR2(B)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XR(E)::B(G),XP(j)
        • P(j);SBLOCK,XR(E)::B(G)
        • P(b);OGATEB::QAB(B)
        • Q(k);N_GUARD::R1(E),XQ(k)
        • B(a);N_GUARD::QAB1(B)
        • B(a);N_GUARD::QAB1(B),XB(a)
      • Refutation
        • Q(k);
    • Try
      • Q(B);CHECK
      • Vars
        • P(g);P_SPINP(g)::B(G),XP(j)
      • Refutation
        • P(g);XQ(B)
  • Actual
    • R(E);XP(b)
    • Threat
      • QAR2(B)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(E)::QAB1(B)
      • P(d);SBLOCK,XR(E)::B(G)
      • P(g);OGATEB::B(G),XP(j)
      • R(e);N_GUARD::QAR2(B),XP(d)
      • B(a);N_GUARD::QAB1(B)
      • B(a);N_GUARD::QAB1(B),XB(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).