MESON Chess Problem Database

Problem Display
PID: 15952 (4r1r1/q1B2N2/p4R2/3p1N1n/4k3/3p2p1/K3P3/4Q3 w - - 0 1)

Rychkov, Vladimir Nikolaevich

3rd HM., Sredba na Solidarnosta, 1989-1994

4r1r1/q1B2N2/p4R2/3p1N1n/4k3/3p2p1/K3P3/4Q3

#2

7 + 9

3705 Album Russia (1992-1994) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Rg5
      • 2.Sxg5#
    • 1...Rf8
      • 2.Sg5#
    • 1...Rh8
      • 2.Sg5#
    • 1...Sg7
      • 2.Sg5#
    • 1...d2
      • 2.Qb1#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qxd3#
      • 1...Qxc7
        • 2.Qe3#
      • 1...dxe2
        • 2.S5d6#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Qd4
        • 2.S5d6#
      • 1...Re5
        • 2.S7d6#
      • 1...Sf4
        • 2.Qxf4#
      • 1...d4!
    • 1.Qb4+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...d4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxd3#
      • 1...Qxc7
        • 2.Qd4#
      • 1...dxe2
        • 2.S5d6#
      • 1...Re5
        • 2.Qxe5#
      • 1...d4
        • 2.Qc6#
      • 1...Qe3
        • 2.S5d6#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Sf4
        • 2.S7d6#
      • 1...d2
        • 2.S5d6#
        • 2.Qc2#
        • 2.Qd3#
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(i);N_GUARD::S(G),XR(i)
    • R(i);N_GUARD::S(G)
    • S(e);S_CUTR(i)::S(G)
    • P(a);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(a)
      • Vars
        • Q(g);N_GUARD,XB(F)::QAR1(A)
        • P(a);XP(C)::S(D)
        • Q(g);N_GUARD::QAR1(A),XQ(g)
        • Q(g);SBLOCK::S(D)
        • R(h);SBLOCK::S(G)
        • S(e);N_GUARD::QAR1(A),XS(e)
      • Refutation
        • P(d);
    • Try
      • Q(A);CHECK
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g)::QAR1(A),XQ(g)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(a)
    • Vars
      • Q(g);N_GUARD,XB(F)::QAR1(A)
      • P(a);XP(C)::S(D)
      • R(h);N_GUARD::QAR1(A),XR(h)
      • P(d);OGATEB::QAB(A)
      • Q(g);SBLOCK::S(D)
      • Q(g);N_GUARD::QAR1(A),XQ(g)
      • S(e);SBLOCK::S(G)
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