MESON Chess Problem Database

Problem Display
PID: 15771 (5r2/n7/2b4Q/4Npp1/2N1k3/2pR2bp/2P2R2/7K w - - 0 1)

Rychkov, Vladimir Nikolaevich

HM., Sovietskaya Tartariya, 1987

5r2/n7/2b4Q/4Npp1/2N1k3/2pR2bp/2P2R2/7K

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qxc6#
    • 1...Sc8
      • 2.Qxc6#
    • 1...g4
      • 2.Re2#
      • 2.Qe3#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Re2#
      • 1...Bxf2
        • 2.Sd6#
      • 1...f4
        • 2.Sd6#
      • 1...Bf4!
    • 1.Re3+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Kd4+!
    • 1.Qxg5?
      • threat
        • 2.Re2#
        • 2.Qe3#
      • 1...Bf4
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...f4
        • 2.Sd6#
        • 2.Re2#
      • 1...Bxf2!
    • 1.Qxh3?
      • threat
        • 2.Qg2#
      • 1...Bxf2
        • 2.Qf3#
      • 1...f4
        • 2.Re2#
      • 1...Rh8!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Sd6#
      • 1...Bxf2
        • 2.Sg6#
      • 1...Rd8
        • 2.Qxf5#
      • 1...Sb5
        • 2.Qxc6#
      • 1...Sc8
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(h);N_GUARD::QAB(G),XB(g)
  • Tries
    • Try
      • S(F);
      • Threat
        • R(C)
      • Vars
        • B(b);N_GUARD,XR(C)::S(E)
        • P(e);S_CUTB(b)::S(E)
      • Refutation
        • B(b);
    • Try
      • R(D);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(G)
      • Refutation
        • K(d);CHECK,P-FLIGHT
    • Try
      • Q(G);XP(f)
      • Threat
        • DUALS(2)
      • Refutation
        • B(b);XR(C)
    • Try
      • Q(G);XP(c)
      • Threat
        • QAB(G)
      • Vars
        • B(b);OGATE,XR(C)::QAB1(G)
        • P(e);SBLOCK::R(C)
      • Refutation
        • R(i);P_PINQ(G)
  • Actual
    • Q(G);
    • Threat
      • S(E)
    • Vars
      • B(b);N_GUARD,XR(C)::QAR(G)+S(F)
      • R(i);N_GUARD::QAB1(G),XP(e)
      • S(h);N_GUARD::QAB(G),XB(g)
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