MESON Chess Problem Database

Problem Display
PID: 209478 (n5r1/K2n4/3p1b2/3pR2r/N2kNBQ1/3P1P2/2P1R2p/6q1 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Suomen Shakki, 1991

n5r1/K2n4/3p1b2/3pR2r/N2kNBQ1/3P1P2/2P1R2p/6q1

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.R2xe4#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sb3#
      • 1...Qb1
        • 2.Bg5#
      • 1...Rb8
        • 2.Bg3#
      • 1...Sc5!
    • 1.Sf2?
      • threat
        • 2.c3#
      • 1...Qxf2
        • 2.Bg5#
      • 1...Qa1
        • 2.Bg5#
      • 1...Qe1
        • 2.Bg5#
      • 1...Rc8
        • 2.Bg3#
      • 1...Qc1!
    • 1.Sec3?
      • threat
        • 2.Sb5#
      • 1...Qb1
        • 2.Bg5#
      • 1...Rb8
        • 2.Bg3#
      • 1...Sc7!
    • 1.Sxd6?
      • threat
        • 2.Sb5#
      • 1...Qb1
        • 2.Bg5#
      • 1...Rb8
        • 2.Bg3#
      • 1...Sc7!
    • 1.Bc1?
      • threat
        • 2.Bb2#
      • 1...Kxe5+
        • 2.Sf2#
      • 1...Qe1
        • 2.Sg5#
      • 1...Rb8
        • 2.Sg3#
      • 1...Rc8
        • 2.Sg3#
      • 1...Qxc1!
    • 1.Be3+?
      • 1...Kxe5
        • 2.d4#
        • 2.f4#
      • 1...Qxe3!
  • Keys
    • 1.Bd2!
      • threat
        • 2.Bc3#
      • 1...Kxe5+
        • 2.Sf2#
      • 1...Qa1
        • 2.Sg5#
      • 1...Qe1
        • 2.Sg5#
      • 1...Rc8
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(d);OGATE,XS(F)::R1(B),XP(d)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • Q(a);N_GUARD::QAR(H)+B(G)
        • R(j);N_GUARD::QAR(H)+B(G)
      • Refutation
        • S(h);
    • Try
      • S(F);
      • Threat
        • P(A)
      • Vars
        • Q(a);N_GUARD,XS(F)::QAR(H)+B(G)
        • Q(a);N_GUARD,P_PINS(E)::QAR(H)+B(G)
        • Q(a);N_GUARD::QAR(H)+B(G)
        • R(j);N_GUARD::QAR(H)+B(G)
      • Refutation
        • Q(a);
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • Q(a);N_GUARD::QAR(H)+B(G)
        • R(j);N_GUARD::QAR(H)+B(G)
      • Refutation
        • S(i);
    • Try
      • S(F);XP(f)
      • Threat
        • S(F)
      • Vars
        • Q(a);N_GUARD::QAR(H)+B(G)
        • R(j);N_GUARD::QAR(H)+B(G)
      • Refutation
        • S(i);
    • Try
      • B(G);
      • Threat
        • B(G)
      • Vars
        • K(c);CHECK,S_FLIGHT,XR(I)::R(B)+S(F)
        • Q(a);N_GUARD::QAR(H)+S(F)
        • R(j);N_GUARD::QAR(H)+S(F)
      • Refutation
        • Q(a);XB(G)
    • Try
      • B(G);CHECK
      • Refutation
        • Q(a);XB(G)
  • Actual
    • B(G);
    • Threat
      • B(G)
    • Vars
      • K(c);CHECK,S_FLIGHT,XR(I)::R(B)+S(F)
      • Q(a);N_GUARD,P_PINS(E)::QAR(H)+S(F)
      • Q(a);N_GUARD::QAR(H)+S(F)
      • R(j);N_GUARD::QAR(H)+S(F)
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