MESON Chess Problem Database

Problem Display
PID: 102037 (q1nR1r2/6p1/4p2N/2N1k1P1/1p2PRP1/p2PK1P1/4QB2/3r4 w - - 0 1)

Gheran, Nicoale

Themes-64, 1971

q1nR1r2/6p1/4p2N/2N1k1P1/1p2PRP1/p2PK1P1/4QB2/3r4

#2

12 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4+
      • 2.Rxe4#
    • 1...Ra1
      • 2.d4#
    • 1...Rb1
      • 2.d4#
    • 1...Rc1
      • 2.d4#
    • 1...Re1
      • 2.d4#
    • 1...Rf1
      • 2.d4#
    • 1...Rg1
      • 2.d4#
    • 1...Rh1
      • 2.d4#
    • 1...Rxd3+
      • 2.Sxd3#
    • 1...Rxf4
      • 2.gxf4#
    • 1...Rf7
      • 2.Sxf7#
    • 1...Rxd8
      • 2.Sf7#
    • 1...Re8
      • 2.Sf7#
    • 1...Rg8
      • 2.Sf7#
    • 1...Rh8
      • 2.Sf7#
    • 1...Sd6
      • 2.Sd7#
    • 1...a2
      • 2.Qb2#
  • Tries
    • 1.Qxd1?
      • threat
        • 2.Qa1#
        • 2.d4#
      • 1...Qxe4+
        • 2.Rxe4#
      • 1...Rxd8
        • 2.Sf7#
      • 1...b3
        • 2.d4#
      • 1...Qd5!
  • Keys
    • 1.Kf3!
      • threat
        • 2.Bd4#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Rxf4+
        • 2.gxf4#
      • 1...Rxd8
        • 2.Sf7#
      • 1...Qd5
        • 2.exd5#
      • 1...Rf1
        • 2.d4#
      • 1...Sd6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • Q(g);CHECK,OGATE,XP(F)::R1(G),XQ(g)
    • R(a);N_GUARD::P(C)
    • R(a);N_GUARD,P_PINQ(A)::P(C)
    • R(a);CHECK,XP(C)::S(I),XR(a)
    • R(i);OGATE,XR(G)::P(E),XR(i)
    • R(i);N_GUARD::S(K),XR(i)
    • R(i);N_GUARD,XR(L)::S(K)
    • R(i);N_GUARD::S(K)
    • S(h);SBLOCK::S(I)
    • P(b);N_GUARD::QAB(A)
  • Tries
    • Try
      • Q(A);XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);CHECK,OGATE,XP(F)::R1(G),XQ(g)
        • R(i);N_GUARD,XR(L)::S(K)
        • P(c);::P(C)
      • Refutation
        • Q(g);
  • Actual
    • K(D);P-FLIGHT,P_SPINP(F),P_SPINR(G)
    • Threat
      • B(B)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XP(F)::QAR1(A),XQ(g)
      • R(a);CHECK,XP(C)::S(I),XR(a)
      • R(i);CHECK,OGATE,XR(G)::P(E),XR(i)
      • R(i);N_GUARD,N_PINR(G),XR(L)::S(K)
      • Q(g);::QAR(A)+P(F),XQ(g)
      • R(a);N_GUARD,P_PINB(B)::P(C)
      • S(h);SBLOCK::S(I)
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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).