MESON Chess Problem Database

Problem Display
PID: 60099 (b1N2b2/1B6/2nnQP2/2prB2K/4kPP1/qR1NppP1/1PP5/8 w - - 0 1)

Umnov, Evgeny Ivanovich

1st Prize, Shakhmaty, 1928/I

b1N2b2/1B6/2nnQP2/2prB2K/4kPP1/qR1NppP1/1PP5/8

#2

13 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd3
      • 2.Bc3#
      • 2.cxd3#
    • 1...Rd4
      • 2.Bxd6#
    • 1...Rxe5+
      • 2.Qxe5#
    • 1...Sb4
      • 2.Sxc5#
    • 1...Sd4
      • 2.Qxd5#
    • 1...Sa5
      • 2.Qxd5#
    • 1...Sxe5
      • 2.Qxd5#
      • 2.Qxe5#
    • 1...Sa7
      • 2.Qxd5#
    • 1...Se7
      • 2.Sxd6#
    • 1...Sb8
      • 2.Qxd5#
    • 1...Sd8
      • 2.Qxd5#
    • 1...Sc4
      • 2.Qf5#
    • 1...Sb5
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sxb7
      • 2.Qf5#
    • 1...Sf7
      • 2.Qf5#
    • 1...Sxc8
      • 2.Qf5#
    • 1...Se8
      • 2.Qf5#
    • 1...e2
      • 2.Sf2#
  • Tries
    • 1.Sxd6+?
      • 1...Bxd6
        • 2.Qf5#
      • 1...Rxd6!
    • 1.Bxc6?
      • threat
        • 2.Qxd5#
      • 1...Qxb3
        • 2.Sxc5#
      • 1...e2
        • 2.Sf2#
      • 1...Bxc6!
  • Keys
    • 1.c4!
      • threat
        • 2.Qxd5#
      • 1...Rxe5+
        • 2.Qxe5#
      • 1...Rxd3
        • 2.Bc3#
      • 1...Sxc4
        • 2.Qf5#
      • 1...e2
        • 2.Sf2#
      • 1...Rd4
        • 2.Bxd6#
      • 1...Sb4
        • 2.Sxc5#
      • 1...Se7
        • 2.Sxd6#

This is a version of 6319

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • R(f);N_PINB(H),P_SPINS(g),SBLOCK::QAR(J)+B(H),XS(h)
    • R(f);CHECK,OGATE,P_SPINR(f),P_SPINS(g),XB(H)::QAR1(J),XR(f)
    • S(g);P_SPINR(f),S_CUTQ(a)::S(D),XP(e)
    • S(g);P_SPINR(f)::QAB1(J),XR(f)
    • S(g);P_SPINR(f),S_CUTB(j)::S(M),XS(h)
    • S(h);N_GUARD::QAB1(J)
    • S(h);N_GUARD,N_PINB(H)::QAB1(J),XS(h)
    • S(h);N_GUARD,XB(L)::QAB1(J)
    • S(h);N_GUARD,XS(M)::QAB1(J)
    • P(b);N_GUARD::S(D)
  • Tries
    • Try
      • S(M);CHECK,XS(h)
      • Vars
        • B(j);XS(M)::QAB1(J)
      • Refutation
        • R(f);N_PINB(H),P_SPINS(g),XS(M)
    • Try
      • B(L);P_PINR(f),XS(g)
      • Threat
        • QAB1(J),XR(f)
      • Vars
        • Q(a);N_GUARD,XR(C)::S(D),XP(e)
        • P(b);N_GUARD::S(D)
      • Refutation
        • B(i);N_SPINR(f),XB(L)
  • Actual
    • P(B);
    • Threat
      • QAB1(J),XR(f)
    • Vars
      • R(f);CHECK,OGATE,P_SPINR(f),P_SPINS(g),XB(H)::QAR1(J),XR(f)
      • R(f);N_PINB(H),P_SPINS(g),SBLOCK,XS(D)::QAR(J)+B(H)
      • S(h);N_GUARD,XP(B)::QAB1(J)
      • P(b);N_GUARD::S(D)
      • R(f);N_PINB(H),P_SPINS(g),SBLOCK::QAR(J)+B(H),XS(h)
      • S(g);P_SPINR(f),S_CUTQ(a)::S(D),XP(e)
      • S(g);P_SPINR(f),S_CUTB(j)::S(M),XS(h)
HTML5 logo

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).