MESON Chess Problem Database

Problem Display
PID: 6319 (b4b2/1B3N2/2nnQR2/2prB2K/4kP2/qR1Npp1p/1PP5/6r1 w - - 0 1)

Umnov, Evgeny Ivanovich

1st Prize, Shakhmaty, 1928/I

b4b2/1B3N2/2nnQR2/2prB2K/4kP2/qR1Npp1p/1PP5/6r1

#2

11 + 12

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sg5#
    • 1...Rb1
      • 2.Sg5#
    • 1...Rc1
      • 2.Sg5#
    • 1...Rd1
      • 2.Sg5#
    • 1...Re1
      • 2.Sg5#
    • 1...Rf1
      • 2.Sg5#
    • 1...Rh1
      • 2.Sg5#
    • 1...Rg5+
      • 2.Sxg5#
    • 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...Sxf7
      • 2.Qf5#
    • 1...Sc8
      • 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...Rg5+
        • 2.Sxg5#
      • 1...Qxb3
        • 2.Sxc5#
      • 1...e2
        • 2.Sf2#
      • 1...Bxc6!
  • Keys
    • 1.c4!
      • threat
        • 2.Qxd5#
      • 1...Rg5+
        • 2.Sxg5#
      • 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#

There are these versions: 60099

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 18
  • Sets
    • R(a);N_GUARD::S(K)
    • R(a);CHECK,N_GUARD,N_PINB(F)::S(K),XR(a)
    • R(h);N_PINB(F),P_SPINS(i),SBLOCK::QAR(H)+B(F),XS(j)
    • R(h);CHECK,OGATE,P_SPINR(h),P_SPINS(i),XB(F)::QAR1(H),XR(h)
    • S(i);P_SPINR(h),S_CUTQ(b)::S(D),XP(g)
    • S(i);P_SPINR(h)::QAB1(H),XR(h)
    • S(i);P_SPINR(h),S_CUTB(l)::S(K),XS(j)
    • S(j);N_GUARD::QAB1(H)
    • S(j);N_GUARD,N_PINB(F)::QAB1(H),XS(j)
    • S(j);N_GUARD,XB(J)::QAB1(H)
    • S(j);N_GUARD,XS(K)::QAB1(H)
    • P(c);N_GUARD::S(D)
  • Tries
    • Try
      • S(K);CHECK,XS(j)
      • Vars
        • B(l);XS(K)::QAB1(H)
      • Refutation
        • R(h);N_PINB(F),P_SPINS(i),XS(K)
    • Try
      • B(J);P_PINR(h),XS(i)
      • Threat
        • QAB1(H),XR(h)
      • Vars
        • R(a);CHECK,N_GUARD,N_PINB(F)::S(K),XR(a)
        • Q(b);N_GUARD,XR(C)::S(D),XP(g)
        • P(c);N_GUARD::S(D)
      • Refutation
        • B(k);N_SPINR(h),XB(J)
  • Actual
    • P(B);
    • Threat
      • QAB1(H),XR(h)
    • Vars
      • R(a);CHECK,N_GUARD,N_PINB(F)::S(K),XR(a)
      • R(h);CHECK,OGATE,P_SPINR(h),P_SPINS(i),XB(F)::QAR1(H),XR(h)
      • R(h);N_PINB(F),P_SPINS(i),SBLOCK,XS(D)::QAR(H)+B(F)
      • S(j);N_GUARD,XP(B)::QAB1(H)
      • P(c);N_GUARD::S(D)
      • R(h);N_PINB(F),P_SPINS(i),SBLOCK::QAR(H)+B(F),XS(j)
      • S(i);P_SPINR(h),S_CUTQ(b)::S(D),XP(g)
      • S(i);P_SPINR(h),S_CUTB(l)::S(K),XS(j)
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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).