MESON Chess Problem Database

Problem Display
PID: 274458 (1b3B2/3p1B2/2p2Q1p/n2Pp3/P1k1n2r/P4N1p/2P1N2K/8 w - - 0 1)

Tokar, Ivan Vasilovich

Mat, 1973

1b3B2/3p1B2/2p2Q1p/n2Pp3/P1k1n2r/P4N1p/2P1N2K/8

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Sxe5#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sf2
      • 2.Sd2#
    • 1...Sc3
      • 2.Sd2#
    • 1...Sg3
      • 2.Sd2#
    • 1...Sc5
      • 2.Sd2#
    • 1...Sg5
      • 2.Sd2#
    • 1...Sxf6
      • 2.Sd2#
    • 1...cxd5
      • 2.Qa6#
    • 1...c5
      • 2.Qa6#
      • 2.d6#
  • Tries
    • 1.Bb4?
      • threat
        • 2.d6#
      • 1...Sxf6
        • 2.Sd2#
      • 1...cxd5
        • 2.Qa6#
      • 1...Bd6
        • 2.dxc6#
      • 1...Sc3
        • 2.Sd2#
      • 1...Sc5
        • 2.Sd2#
      • 1...Sg5
        • 2.Sd2#
      • 1...Sd6
        • 2.Sd2#
        • 2.Sxe5#
      • 1...d6!
    • 1.Qxc6+?
      • 1...Sc5
        • 2.Sd2#
        • 2.Qb5#
        • 2.Qxc5#
        • 2.d6#
      • 1...dxc6
        • 2.dxc6#
      • 1...Sxc6!
  • Keys
    • 1.Qxe5!
      • threat
        • 2.d6#
      • 1...Bxe5+
        • 2.Sxe5#
      • 1...cxd5
        • 2.Bxd5#
      • 1...Bd6
        • 2.dxc6#
      • 1...Sd6
        • 2.Qc3#
      • 1...d6
        • 2.Qd4#
      • 1...Rf4
        • 2.Qd4#
      • 1...Sc3
        • 2.Sd2#
      • 1...Sc5
        • 2.Sd2#
      • 1...Sg5
        • 2.Sd2#
      • 1...Sf6
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • B(j);N_GUARD::S(E),XP(f)
    • S(c);N_GUARD::S(E),XS(c)
    • S(c);N_GUARD::S(E)
    • S(c);N_GUARD,XQ(H)::S(E)
    • P(g);OGATE,P_SPINP(g),XP(G)::QAB(H)
  • Tries
    • Try
      • B(J);
      • Threat
        • B(I)+P(G)
      • Vars
        • S(c);N_GUARD,XQ(H)::S(E)
        • P(g);OGATE,P_SPINP(g),XP(G)::QAB(H)
        • B(j);S_CUTP(i)::B(I)+P(G),XP(g)
        • S(c);N_GUARD::S(E)
      • Refutation
        • P(i);
    • Try
      • Q(H);CHECK,XP(g)
      • Vars
        • P(i);OGATE,XQ(H)::B(I)+P(G),XP(i)
      • Refutation
        • S(e);XQ(H)
  • Actual
    • Q(H);P_SPINQ(H),XP(f)
    • Threat
      • B(I)+P(G)
    • Vars
      • B(j);CHECK,XQ(H)::S(E),XB(j)
      • P(g);OGATE,P_SPINP(g),XP(G)::B(I),XP(g)
      • B(j);S_CUTP(i)::B(I)+P(G),XP(g)
      • S(c);N_PINQ(H)::QAR1(H)
      • P(i);N_PINQ(H)::QAR1(H)
      • R(d);N_PINQ(H)::QAR1(H)
      • S(c);N_GUARD::S(E)
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