MESON Chess Problem Database

Problem Display
PID: 134223 (1B6/2N4B/2P1p3/1PpNk1P1/r4pK1/nP2b3/1r1n3Q/3RR3 w - - 0 1)

Gafarov, Marsil

1st Prize, Sverdlovsk Ty., 1962

1B6/2N4B/2P1p3/1PpNk1P1/r4pK1/nP2b3/1r1n3Q/3RR3

#2

12 + 9

23 Die Schwalbe 2009
56 The Problemist 2009
102 Probleemblad 2010
5454 Near Snap 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qxf4#
    • 1...Ra6
      • 2.Qxf4#
    • 1...Ra7
      • 2.Qxf4#
    • 1...Ra8
      • 2.Qxf4#
    • 1...Sdb1
      • 2.Sa6#
      • 2.Sa8#
      • 2.Se8#
    • 1...Sf1
      • 2.Sa6#
      • 2.Sa8#
      • 2.Se8#
    • 1...Sxb3
      • 2.Sa6#
      • 2.Sa8#
      • 2.Se8#
    • 1...Sf3
      • 2.Sa6#
      • 2.Sa8#
      • 2.Se8#
    • 1...Sdc4
      • 2.Qxf4#
    • 1...Sac4
      • 2.Qxf4#
    • 1...c4
      • 2.Qxf4#
  • Tries
    • 1.Sxe6+?
      • 1...Kxe6
        • 2.Bg8#
      • 1...Kxd5!
    • 1.Rxe3+?
      • 1...Kd4
        • 2.Qxf4#
      • 1...Kd6
        • 2.Rxe6#
      • 1...Se4
        • 2.Sa6#
        • 2.Sa8#
        • 2.Se8#
        • 2.Qxf4#
      • 1...Re4!
  • Keys
    • 1.Sxf4!
      • threat
        • 2.Sxe6#
      • 1...Rxf4+
        • 2.Qxf4#
      • 1...Kd4
        • 2.Se2#
      • 1...Kd6
        • 2.Sd5#
      • 1...Sxb5
        • 2.Sxb5#
      • 1...Rd4
        • 2.Sd5#
      • 1...Ra7
        • 2.Sfxe6#
      • 1...Ra8
        • 2.Sfxe6#
      • 1...Sdc4
        • 2.Sg2#
      • 1...Se4
        • 2.Sg6#
      • 1...Sac4
        • 2.Sfxe6#

Anticipated by 5979(1926)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(e);N_GUARD::QAB1(C),XP(f)
    • S(b);S_CUTR(e)::QAB1(C),XP(f)
    • S(c);S_CUTR(e)::QAB1(C),XP(f)
    • P(g);S_CUTR(e)::QAB1(C),XP(f)
  • Tries
    • Try
      • S(J);CHECK,XP(i)
      • Vars
        • K(h);N_SPINP(f),P-FLIGHT,XS(J)::B(K)
      • Refutation
        • K(h);N_SPINB(d),N_SPINP(f),P-FLIGHT,P_SPINS(b),XS(G)
    • Try
      • R(B);CHECK,XB(d)
      • Vars
        • K(h);N_SPINP(f),P_SPINS(b),S_FLIGHT::QAR2(C),XP(f)
        • K(h);OGATE,S_FLIGHT::R1(B),XP(i)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • S(G);P_SPINS(G),XP(f)
    • Threat
      • B(L)+S(J),XP(i)
    • Vars
      • R(e);CHECK,OGATE,P_SPINR(e),XS(G)::QAB1(C),XR(e)
      • K(h);N_PINS(G),N_SPINB(d),P_SPINS(b),S_FLIGHT::S(G)
      • K(h);N_SPINB(d),P_SPINS(b),S_FLIGHT::B(L)+S(J)
      • S(c);XP(F)::B(L)+S(J),XS(c)
      • R(e);SBLOCK::B(L)+S(J)
      • R(e);N_PINS(G)::QAB(C)+S(G),XP(i)
      • S(b);N_PINS(G)::QAB(C)+S(G)
      • S(b);N_PINS(G),N_SPINB(d),SBLOCK::QAB(C)+S(G),DCHECK
      • S(c);N_PINS(G)::QAB(C)+S(G),XP(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).