MESON Chess Problem Database

Problem Display
PID: 97384 (1q2Rnr1/4Q3/8/N1Bk1r2/1P1pp3/8/K1P5/4R1bb w - - 0 1)

Andersson, Sven Tore

Problemas, 1967

1q2Rnr1/4Q3/8/N1Bk1r2/1P1pp3/8/K1P5/4R1bb

#2

8 + 9

6490 yacpdb 2009
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Qb7#
    • 1...Qg3
      • 2.Qb7#
    • 1...Qf4
      • 2.Qb7#
    • 1...Qe5
      • 2.Qb7#
    • 1...Qd6
      • 2.Qxd6#
    • 1...Qa7
      • 2.Qd6#
    • 1...Qxb4
      • 2.Qd6#
    • 1...Qb5
      • 2.Qd6#
    • 1...Qb7
      • 2.Qd6#
      • 2.Qxb7#
    • 1...Qa8
      • 2.Qd6#
    • 1...Qc8
      • 2.Qd6#
    • 1...Qd8
      • 2.Qb7#
    • 1...Qxe8
      • 2.Qd6#
    • 1...Rf3
      • 2.Qxe4#
    • 1...Rg2
      • 2.Qxe4#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sg6
      • 2.Qe6#
    • 1...Sd7
      • 2.Qe6#
    • 1...Sh7
      • 2.Qe6#
    • 1...d3
      • 2.c4#
  • Tries
    • 1.Qd7+?
      • 1...Qd6
        • 2.Qxd6#
      • 1...Sxd7!
    • 1.Qf7+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Rxf7!
  • Keys
    • 1.Rd1!
      • threat
        • 2.c4#
      • 1...Qxb4
        • 2.Qd6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Qh2
        • 2.Qb7#
      • 1...Qb5
        • 2.Qd6#
      • 1...Rf2
        • 2.Rxd4#
      • 1...Rg2
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 14
  • Sets
    • Q(g);N_GUARD,P_PINP(C)::QAB(G)
    • Q(g);N_GUARD::QAB(G)
    • Q(g);N_GUARD::QAR1(G),XQ(g)
    • Q(g);N_GUARD,P_PINS(E)::QAR1(G)
    • Q(g);N_GUARD,XP(D)::QAR1(G)
    • Q(g);N_GUARD::QAR1(G)
    • Q(g);N_GUARD,XR(H)::QAR1(G)
    • R(f);S_CUTB(b)::QAB1(G),XP(d)
    • R(i);P_PINP(C),S_CUTB(b)::QAB1(G),XP(d)
    • S(h);N_GUARD::QAB1(G),XS(h)
    • S(h);N_GUARD::QAB1(G)
    • P(c);N_GUARD::P(C)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g)::QAR1(G),XQ(g)
      • Refutation
        • S(h);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAB1(G),XS(h)
      • Refutation
        • R(f);XQ(G)
  • Actual
    • R(A);P_PINP(c)
    • Threat
      • P(C)
    • Vars
      • Q(g);N_GUARD,XP(D)::QAR1(G)
      • S(h);N_GUARD::QAB1(G),XS(h)
      • Q(g);N_GUARD,P_PINP(C)::QAB(G)
      • Q(g);N_GUARD::QAR1(G)
      • R(f);P_PINP(C),S_CUTB(a)::R1(A),XP(c)
      • R(i);P_PINP(C),S_CUTB(b)::QAB1(G),XP(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).