MESON Chess Problem Database

Problem Display
PID: 55120 (8/2R2Npq/K3p1p1/1pN5/3kP3/pp4R1/1bbPB2p/n1Q5 w - - 0 1)

Mochalkin, Oleksandr Viktorovich

1st HM., Troll, 1991

8/2R2Npq/K3p1p1/1pN5/3kP3/pp4R1/1bbPB2p/n1Q5

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.dxc3#
    • 1...Bb1
      • 2.Rd7#
    • 1...Bd1
      • 2.Rd3#
      • 2.Rd7#
    • 1...Bd3
      • 2.Rxd3#
      • 2.Rd7#
    • 1...h1B
      • 2.Qg1#
    • 1...a2
      • 2.Qxb2#
  • Tries
    • 1.Kxb5?
      • threat
        • 2.Rd7#
      • 1...Bd3+
        • 2.Rxd3#
      • 1...Bxe4
        • 2.Qc4#
      • 1...Qh5!
    • 1.Bd3?
      • threat
        • 2.Sxe6#
      • 1...Bxd3
        • 2.Rxd3#
        • 2.Rd7#
      • 1...e5
        • 2.Se6#
      • 1...Qh3!
    • 1.Rd3+?
      • 1...Bxd3
        • 2.Rd7#
      • 1...Kc4!
    • 1.Rg5?
      • threat
        • 2.Rd7#
      • 1...Bxe4
        • 2.Sxe6#
      • 1...e5!
    • 1.Qh1?
      • threat
        • 2.Sxe6#
      • 1...Bxe4
        • 2.Qxe4#
      • 1...e5
        • 2.Se6#
      • 1...Qh3!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Sxe6#
      • 1...Bxe4
        • 2.Rd7#
      • 1...e5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(b);OGATE::P(B),XB(b)
    • B(c);::R(H)
    • P(d);N_GUARD::QAB(A)
    • P(e);N_GUARD::QAB(A),XB(b)
  • Tries
    • Try
      • K(G);S_FLIGHT,XP(h)
      • Threat
        • R(H)
      • Vars
        • B(c);CHECK,N_GUARD::R1(D),XB(c)
        • B(c);OGATE,XP(E)::QAR1(A)
      • Refutation
        • Q(l);P_PINS(F)
    • Try
      • B(C);
      • Threat
        • S(F),XP(i)
      • Vars
        • P(i);::S(F)
      • Refutation
        • Q(l);
    • Try
      • R(D);CHECK
      • Vars
        • B(c);XR(D)::R(H)
      • Refutation
        • K(g);P-FLIGHT,P_SPINB(c)
    • Try
      • R(D);
      • Threat
        • R(H)
      • Vars
        • B(c);SBLOCK,XP(E)::S(F),XP(i)
      • Refutation
        • P(i);
    • Try
      • Q(A);
      • Threat
        • S(F),XP(i)
      • Vars
        • B(c);OGATE,XP(E)::QAR1(A),XB(c)
        • P(i);::S(F)
      • Refutation
        • Q(l);
  • Actual
    • R(D);
    • Threat
      • S(F),XP(i)
    • Vars
      • B(c);P_SPINB(c),XP(E)::R(H)
      • P(i);::S(F)
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