MESON Chess Problem Database

Problem Display
PID: 161765 (1RR4r/p1pP1b2/2k2N2/6p1/1BPn4/1p4pp/1K2N1rq/4Q2B w - - 0 1)

Archakov, Vladimir Mikhailovich

Chess Life, 1969

1RR4r/p1pP1b2/2k2N2/6p1/1BPn4/1p4pp/1K2N1rq/4Q2B

#2

10 + 12

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.d8S#
    • 1...Rh5
      • 2.d8S#
    • 1...Rh6
      • 2.d8S#
    • 1...Rh7
      • 2.d8S#
    • 1...Bd5
      • 2.cxd5#
    • 1...Be8
      • 2.d8S#
    • 1...Bg8
      • 2.d8S#
    • 1...Sb5
      • 2.cxb5#
  • Tries
    • 1.Bxg2+?
      • 1...Bd5
        • 2.Sxd4#
        • 2.Bxd5#
        • 2.cxd5#
      • 1...Sf3
        • 2.Sd4#
      • 1...hxg2
        • 2.Sxd4#
      • 1...Qxg2!
    • 1.d8Q?
      • threat
        • 2.Rxc7#
        • 2.Qxc7#
        • 2.Qd6#
        • 2.Qd7#
      • 1...Se6
        • 2.Qd5#
        • 2.Qd6#
        • 2.Qd7#
      • 1...Be6
        • 2.Rxc7#
        • 2.Qxc7#
        • 2.Qd6#
      • 1...Be8
        • 2.Rxc7#
        • 2.Qxc7#
        • 2.Qd5#
        • 2.Qd6#
      • 1...Sb5
        • 2.Qd7#
        • 2.cxb5#
      • 1...Sf5
        • 2.Rxc7#
        • 2.Qxc7#
        • 2.Qd7#
      • 1...Rxd8!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Sxd4#
      • 1...Sxe2
        • 2.Qc5#
      • 1...Se6
        • 2.Qf3#
      • 1...Rh4
        • 2.d8S#
      • 1...Sc2
        • 2.Qc5#
      • 1...Sf3
        • 2.Qc5#
      • 1...Sb5
        • 2.Qc5#
        • 2.cxb5#
      • 1...Sf5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(l);N_GUARD::P=S
    • B(k);N_SPINR(a),OGATE::P(F),XB(k)
    • B(k);S_CUTR(l)::P=S
    • S(f);OGATE::P(F),XS(f)
  • Tries
    • Try
      • B(B);CHECK,N_SPINS(D),XR(a)
      • Vars
        • S(f);P_SPINS(f)::S(D)
        • P(e);XB(B)::S(D),XS(f)
      • Refutation
        • Q(b);P_PINS(D),XB(B)
    • Try
      • P(H);
      • Threat
        • DUALS(4)
      • Refutation
        • R(l);XQ(H)
  • Actual
    • Q(A);N_SPINS(D)
    • Threat
      • S(D),XS(f)
    • Vars
      • S(f);OGATE,XS(D)::QAR1(A)
      • S(f);N_GUARD,S_CUTB(k)::QAB(A)
      • R(l);N_GUARD::P=S
      • S(f);OGATE::QAR1(A)
      • S(f);N_SPINR(a),OGATE::QAR1(A)
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