MESON Chess Problem Database

Problem Display
PID: 103870 (bb1Q4/5KpB/8/4p1Rr/1N3kpB/1r6/3P1p1P/3nNR2 w - - 0 1)

Antonov, Yuri Mikhailovich

Shedey, Sergey Oleksandrovich

Shakhmaty, 1980

bb1Q4/5KpB/8/4p1Rr/1N3kpB/1r6/3P1p1P/3nNR2

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Sbd3#
      • 2.Bg3#
    • 1...Rb2
      • 2.Sbd3#
      • 2.Bg3#
    • 1...Rd3
      • 2.Sbxd3#
    • 1...Rf3
      • 2.Sg2#
    • 1...Rg3
      • 2.Bxg3#
      • 2.hxg3#
    • 1...Rxb4
      • 2.Bg3#
    • 1...Rxg5
      • 2.Bxg5#
      • 2.Qxg5#
    • 1...Bf3
      • 2.Bg3#
    • 1...Bd5+
      • 2.Sxd5#
    • 1...Sc3
      • 2.Sbd3#
      • 2.Bg3#
    • 1...Se3
      • 2.Bg3#
    • 1...e4
      • 2.Qxb8#
  • Tries
    • 1.Bd3?
      • threat
        • 2.Bg3#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Rxh4
        • 2.Rf5#
      • 1...g3
        • 2.Bxg3#
        • 2.hxg3#
      • 1...Rxd3!
    • 1.Rxf2+?
      • 1...Rf3
        • 2.Sg2#
        • 2.Sed3#
        • 2.Sbd3#
        • 2.Bg3#
      • 1...Bf3
        • 2.Sg2#
        • 2.Sd5#
        • 2.Bg3#
      • 1...Sxf2!
    • 1.Rxh5?
      • threat
        • 2.Bg5#
        • 2.Qg5#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...g3
        • 2.Qg5#
      • 1...e4
        • 2.Rf5#
        • 2.Qg5#
        • 2.Qxb8#
      • 1...g5
        • 2.Bxg5#
        • 2.Qxg5#
        • 2.Qf6#
      • 1...g6!
    • 1.Qd3?
      • threat
        • 2.Qf5#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Rxd3
        • 2.Sbxd3#
      • 1...Rxg5
        • 2.Bg3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Se3
        • 2.dxe3#
      • 1...e4
        • 2.Sg2#
      • 1...g6!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Sg2#
      • 1...Bxd5+
        • 2.Sxd5#
      • 1...Rxh4
        • 2.Rf5#
      • 1...Rg3
        • 2.hxg3#
      • 1...Se3
        • 2.Rxf2#
      • 1...e4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::S(E),XR(c)
    • R(c);N_SPINP(b),SBLOCK,S_CUTB(i)::S(A)
    • R(c);N_GUARD,XS(E)::B(F)
    • B(i);N_SPINP(b),S_CUTR(c)::B(F)
    • B(i);CHECK,N_GUARD::S(E),XB(i)
    • S(a);S_CUTR(c)::B(F)
    • P(f);OGATEB::QAB(J),XB(j)
  • Tries
    • Try
      • B(I);
      • Threat
        • B(F)
      • Vars
        • B(i);CHECK,N_GUARD::S(E),XB(i)
        • R(g);N_GUARD,XB(F)::R1(G)
      • Refutation
        • R(c);XB(I)
    • Try
      • R(B);CHECK,XP(b)
      • Refutation
        • S(a);XR(B)
    • Try
      • R(G);XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(i);CHECK,N_GUARD::S(E),XB(i)
        • P(e);::QAB1(J)
      • Refutation
        • P(h);
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • B(i);CHECK,N_GUARD::S(E),XB(i)
        • R(c);XQ(J)::S(E),XR(c)
        • R(g);SBLOCK,XR(G)::B(F)
        • B(i);N_GUARD::QAR1(J),XB(i)
        • S(a);OGATE::P(C),XS(a)
        • P(f);S_CUTB(i)::S(A)
      • Refutation
        • P(h);
  • Actual
    • Q(J);
    • Threat
      • S(A)
    • Vars
      • B(i);CHECK,XQ(J)::S(E),XB(i)
      • R(g);N_GUARD,XB(F)::R1(G)
      • R(c);OGATE::P(D),XR(c)
      • S(a);N_GUARD,S_CUTR(c)::R(B),XP(b)
      • P(f);OGATE::QAR1(J)
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