MESON Chess Problem Database

Problem Display
PID: 174495 (2bQ4/3nNK1p/3pPR2/2PPk2r/3pp3/2p3P1/7b/BB1R4 w - - 0 1)

Volchek, Viktor Fedorovich

3rd Comm., Birnov MT, 2000

2bQ4/3nNK1p/3pPR2/2PPk2r/3pp3/2p3P1/7b/BB1R4

#2

11 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rh3
      • 2.Rf5#
    • 1...Rh4
      • 2.Rf5#
    • 1...Rf5
      • 2.Rxf5#
    • 1...Rh6
      • 2.Rf5#
    • 1...Sb6
      • 2.Qxd6#
    • 1...Sxf6
      • 2.Qxd6#
    • 1...Sb8
      • 2.Qxd6#
    • 1...Sf8
      • 2.Qxd6#
    • 1...c2
      • 2.Bxd4#
    • 1...d3
      • 2.Bxc3#
    • 1...dxc5
      • 2.Qc7#
  • Tries
    • 1.Bxc3?
      • threat
        • 2.Bxd4#
      • 1...dxc3
        • 2.Sc6#
      • 1...dxc5
        • 2.Qc7#
      • 1...Bg1!
    • 1.Qc7?
      • threat
        • 2.Qxd6#
      • 1...d3
        • 2.Bxc3#
      • 1...Sxc5!
    • 1.Qxd7?
      • threat
        • 2.Qxd6#
      • 1...dxc5
        • 2.Sc6#
        • 2.Qc7#
      • 1...d3
        • 2.Bxc3#
      • 1...Bxd7!
    • 1.Qh8?
      • threat
        • 2.Rf5#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Rf5
        • 2.Rxf5#
      • 1...dxc5!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Rxe4#
      • 1...Rf5+
        • 2.Rxf5#
      • 1...Sxc5
        • 2.Qh8#
      • 1...dxc5
        • 2.Qc7#
      • 1...d3
        • 2.Bxc3#
      • 1...Rh4
        • 2.Rf5#
      • 1...Sf6
        • 2.Qxd6#
      • 1...c2
        • 2.Bxd4#
      • 1...e3
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD::R1(H)
    • R(f);N_GUARD,P_PINR(H)::R1(H),XR(f)
    • S(h);OGATE::QAB1(K),XP(g)
    • S(h);OGATE,XR(H)::QAB1(K),XP(g)
    • P(b);OGATE,P_SPINP(c)::B(A),XP(c)
    • P(c);OGATEB,P_SPINP(b)::B(A),XP(b)
    • P(g);OGATEB,XP(E)::QAB(K)
  • Tries
    • Try
      • B(A);P_PINP(c),XP(b)
      • Threat
        • B(A),XP(c)
      • Vars
        • P(c);N_SPINP(c),XB(A)::S(I)
        • P(g);OGATEB,XP(E)::QAB(K)
      • Refutation
        • B(a);
    • Try
      • Q(K);P_PINP(g)
      • Threat
        • QAB1(K),XP(g)
      • Vars
        • P(c);N_SPINP(g),OGATEB,P_SPINP(b)::B(A),XP(b)
      • Refutation
        • S(h);XP(E)
    • Try
      • Q(K);XS(h)
      • Threat
        • QAB1(K),XP(g)
      • Vars
        • P(c);OGATEB,P_SPINP(b)::B(A),XP(b)
      • Refutation
        • B(j);XQ(K)
    • Try
      • Q(K);
      • Threat
        • QAB(K)+R(H),DCHECK
      • Vars
        • S(h);OGATE,P_SPINS(h),XR(H)::QAB1(K),XS(h)
        • R(f);P_PINR(H)::QAB(K)+R(H),DCHECK,XR(f)
      • Refutation
        • P(g);XP(E)
  • Actual
    • R(H);
    • Threat
      • R1(H),XP(d)
    • Vars
      • R(f);CHECK,N_GUARD::R1(H),XR(f)
      • S(h);N_GUARD,XP(E)::QAB(K)
      • P(g);OGATEB,XP(E)::QAB(K)
      • P(c);OGATEB,P_SPINP(b)::B(A),XP(b)
      • R(f);N_GUARD::R1(H)
      • S(h);OGATE::QAB1(K),XP(g)
      • P(b);OGATE,P_SPINP(c)::B(A),XP(c)
      • P(d);::R1(H)
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