MESON Chess Problem Database

Problem Display
PID: 241367 (1b2Rq2/3bp3/2p2B2/1N4nN/n2Pk1Pp/4p3/B1K5/1R3Q2 w - - 0 1)

Gavrilov, Constantin Grigorievich

Revista Romana de Sah, 1939

1b2Rq2/3bp3/2p2B2/1N4nN/n2Pk1Pp/4p3/B1K5/1R3Q2

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6
      • 2.Sxf6#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bxe8
      • 2.Qf5#
    • 1...Bf4
      • 2.Qxf4#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Ba7
      • 2.Sd6#
      • 2.Qf4#
    • 1...Sb2
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Sc5
      • 2.Sc3#
    • 1...Sb6
      • 2.Sc3#
    • 1...Sf3
      • 2.Qd3#
    • 1...Sh3
      • 2.Qg2#
      • 2.Qh1#
    • 1...Se6
      • 2.Qg2#
      • 2.Qh1#
      • 2.Qf5#
    • 1...Sf7
      • 2.Qg2#
      • 2.Qh1#
    • 1...Sh7
      • 2.Qg2#
      • 2.Qh1#
    • 1...e2
      • 2.Qxe2#
    • 1...e5
      • 2.Qf4#
    • 1...e6
      • 2.Qf5#
  • Tries
    • 1.Rxe7+?
      • 1...Be6
        • 2.Qf5#
      • 1...Be5
        • 2.Rxe5#
        • 2.Qf4#
      • 1...Se6
        • 2.Qg2#
        • 2.Qh1#
        • 2.Qf5#
      • 1...Qxe7!
  • Keys
    • 1.Rb4!
      • threat
        • 2.d5#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...e2
        • 2.Qxe2#
      • 1...Be5
        • 2.dxe5#
      • 1...Bd6
        • 2.Sxd6#
      • 1...Ba7
        • 2.Sd6#
        • 2.Qf4#
      • 1...Sb2
        • 2.Sc3#
      • 1...Sb6
        • 2.Sc3#
      • 1...Sf3
        • 2.Qd3#
      • 1...Se6
        • 2.Qg2#
        • 2.Qh1#
        • 2.Qf5#
      • 1...c5
        • 2.dxc5#
      • 1...e5
        • 2.Qf4#
      • 1...e6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(j);XB(I)::S(H),XQ(j)
    • B(g);N_GUARD::QAB1(B),XB(g)
    • B(g);N_GUARD,N_SPINP(h),XR(J)::QAB1(B)
    • B(i);N_GUARD::QAR1(B),XB(i)
    • B(i);N_GUARD::S(G),XB(i)
    • S(b);N_GUARD::S(G)
    • S(b);N_GUARD::S(G),XS(b)
    • S(e);SBLOCK::QAB1(B)
    • P(a);OGATEB::QAR2(B),XP(a)
    • P(h);S_CUTB(i)::QAR1(B)
    • P(h);S_CUTB(g)::QAB1(B)
  • Tries
    • Try
      • R(J);CHECK,XP(h)
      • Vars
        • B(g);P_SPINB(g)::QAB1(B)
      • Refutation
        • Q(j);XR(J)
  • Actual
    • R(A);
    • Threat
      • R(A)+P(E)
    • Vars
      • Q(j);XB(I)::S(H),XQ(j)
      • P(a);OGATEB::QAR2(B),XP(a)
      • B(i);N_SPINP(h),OGATE::R(A)+P(E),XB(i)
      • B(i);N_GUARD::S(G),XB(i)
      • S(b);N_GUARD::S(G)
      • S(e);SBLOCK::QAB1(B)
      • P(f);OGATE::R(A)+P(E),XP(f)
      • P(h);S_CUTB(i)::QAR1(B)
      • P(h);S_CUTB(g)::QAB1(B)
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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).