MESON Chess Problem Database

Problem Display
PID: 7525 (K2b2b1/2p4r/R3n2p/3k1P1Q/pR3P2/2pr3p/8/q4nB1 w - - 0 1)

Rychkov, Vladimir Nikolaevich

1st Prize, 4. Russian Ty., 1991

K2b2b1/2p4r/R3n2p/3k1P1Q/pR3P2/2pr3p/8/q4nB1

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qf3#
    • 1...Rd2
      • 2.Qf3#
    • 1...Rf3
      • 2.Qxf3#
    • 1...Re7
      • 2.fxe6#
    • 1...Sc5
      • 2.f6#
    • 1...Sf8
      • 2.f6#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qe4#
        • 2.Qe5#
      • 1...Sxf4
        • 2.Qe4#
      • 1...Re3
        • 2.Qc4#
      • 1...Rd4
        • 2.Qe5#
      • 1...Sd4
        • 2.Qe5#
      • 1...c6
        • 2.Qe5#
      • 1...Qe1
        • 2.Qa2#
      • 1...Bf6
        • 2.Qe4#
      • 1...Sd2
        • 2.Qe5#
      • 1...Sg3
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#
      • 1...Sg5
        • 2.Qxd3#
        • 2.Qe5#
      • 1...c2
        • 2.Qe4#
      • 1...Se3!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qc6#
      • 1...Sxf4
        • 2.Qe4#
      • 1...Sd4
        • 2.Qe5#
      • 1...c6
        • 2.Qxc6#
      • 1...Rd7
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(d);N_GUARD::QAB(E)
    • R(d);N_GUARD::QAB(E),XR(d)
    • R(k);S_CUTB(l)::QAR(E)+P(D),XS(h)
    • S(h);N_GUARD::QAR(E)+P(D)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(h);XP(C)::QAB1(E)
        • R(d);OGATE::QAB1(E)
        • R(d);::QAR1(E)
        • S(h);::QAR1(E)
        • P(j);::QAR1(E)
        • Q(a);N_GUARD::QAB(E)
        • B(l);::QAB1(E)
        • S(b);::QAR1(E)
        • P(c);::QAB1(E)
      • Refutation
        • S(b);
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • S(h);OGATE,XP(C)::QAB1(E)
      • S(h);OGATE::QAR1(E)
      • P(j);::QAB1(E),XP(j)
      • R(k);N_GUARD::QAR2(E),XR(k)
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