MESON Chess Problem Database

Problem Display
PID: 233988 (b2K4/2Q4R/1p1BN2R/1P1krp2/3r4/4P2n/3P4/5B2 w - - 0 1)

Nikitin, Aleksandr Olegovich

HM., Chess Life, 1986

b2K4/2Q4R/1p1BN2R/1P1krp2/3r4/4P2n/3P4/5B2

#2

10 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Qxc6#
  • Tries
    • 1.Qc4+?
      • 1...Ke4
        • 2.Bg2#
      • 1...Kxd6
        • 2.Rd7#
      • 1...Rxc4!
    • 1.Qb7+?
      • 1...Kxd6
        • 2.Rd7#
        • 2.Qd7#
      • 1...Bxb7!
    • 1.Qg7?
      • threat
        • 2.Qxe5#
      • 1...Ke4
        • 2.Qg2#
      • 1...Kxd6
        • 2.Qd7#
      • 1...Rxe3
        • 2.Qxd4#
      • 1...Rxe6
        • 2.Qxd4#
      • 1...Rde4
        • 2.Sc7#
      • 1...Ree4
        • 2.Sc7#
      • 1...Rd3!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxd4#
      • 1...Ke4
        • 2.Bg2#
      • 1...Kxd6
        • 2.Rd7#
      • 1...Rxd2
        • 2.Qxe5#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Ra4
        • 2.Qxe5#
      • 1...Rb4
        • 2.Qxe5#
      • 1...Rc4
        • 2.Qxe5#
      • 1...Rde4
        • 2.Sc7#
      • 1...Rf4
        • 2.Qxe5#
      • 1...Rg4
        • 2.Qxe5#
      • 1...Rh4
        • 2.Qxe5#
      • 1...Ree4
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 1
  • Sets
    • B(g);N_GUARD::QAB1(H),XB(g)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);P_PINB(E),P_SPINR(b),S_FLIGHT::B(A)
        • K(c);P-FLIGHT,XB(E)::R1(I)
      • Refutation
        • R(b);XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • B(g);XQ(H)
    • Try
      • Q(H);
      • Threat
        • QAR1(H),XR(d)
      • Vars
        • K(c);P_PINB(E),S_FLIGHT::QAB(H)
        • K(c);OGATEB,P-FLIGHT,XB(E)::QAR1(H)
        • R(d);OGATE,XP(C)::QAR1(H),XR(b)
        • R(d);OGATE,XS(F)::QAR1(H),XR(b)
        • R(b);SBLOCK::S(F)
        • R(d);SBLOCK::S(F)
      • Refutation
        • R(b);
  • Actual
    • Q(H);
    • Threat
      • QAR1(H),XR(b)
    • Vars
      • K(c);P_PINB(E),S_FLIGHT::B(A)
      • K(c);OGATEB,P-FLIGHT,XB(E)::R1(I)
      • R(b);OGATE,XP(B)::QAR1(H),XR(d)
      • R(b);OGATEB::QAR2(H),XR(b)
      • R(b);OGATE::QAR1(H),XR(d)
      • R(b);SBLOCK::S(F)
      • R(d);SBLOCK::S(F)
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