MESON Chess Problem Database

Problem Display
PID: 219 (8/8/bN2p3/8/4k1P1/3Nb3/1B4R1/3K1Q2 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

Patriot Rodin, 1950

8/8/bN2p3/8/4k1P1/3Nb3/1B4R1/3K1Q2

#2

7 + 4

3242 BCPS Rapid Solving (Cheltenham) 2001

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Qf5#
  • Tries
    • 1.Qf3+?
      • 1...Kxd3
        • 2.Rd2#
      • 1...Kxf3!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Rd2#
      • 1...Kxd3
        • 2.Qh7#
      • 1...Kf3
        • 2.Rg1#
      • 1...Bxb6
        • 2.Rg3#
      • 1...Bxd3
        • 2.Rf2#
      • 1...Bc1
        • 2.Rg3#
      • 1...Bg1
        • 2.Rg3#
      • 1...Bd2
        • 2.Rg3#
      • 1...Bf2
        • 2.Rg3#
      • 1...Bd4
        • 2.Rg3#
      • 1...Bf4
        • 2.Rg3#
      • 1...Bc5
        • 2.Rg3#
      • 1...Bg5
        • 2.Rg3#
      • 1...Bh6
        • 2.Rg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::QAB1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P_SPINB(a),S_FLIGHT,XS(E)::R1(D)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+R(D)
    • Vars
      • K(b);S_FLIGHT,XS(E)::QAB(B)
      • K(b);S_FLIGHT::QAB(B)+R(D)
      • B(a);XS(G)::QAB(B)+R(D)
      • B(c);SBLOCK,XS(E)::QAB(B)+R(D)
      • B(a);::QAB(B)+R(D)
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