MESON Chess Problem Database

Problem Display
PID: 158146 (8/8/8/Np6/1N1np3/Q1K5/PR2p3/q1kbR3 w - - 0 1)

Archakov, Vladimir Mikhailovich

Shakhmaty, 1966

8/8/8/Np6/1N1np3/Q1K5/PR2p3/q1kbR3

#2

7 + 7

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb2+
      • 2.Qxb2#
    • 1...Qb1
      • 2.Rc2#
    • 1...Qxa2
      • 2.Sxa2#
    • 1...Sc2
      • 2.Sb3#
    • 1...Sb3
      • 2.Sxb3#
    • 1...Sf3
      • 2.Sb3#
    • 1...Sf5
      • 2.Sb3#
    • 1...Sc6
      • 2.Sb3#
    • 1...Se6
      • 2.Sb3#
    • 1...e3
      • 2.Sd3#
  • Tries
    • 1.Kxd4?
      • threat
        • 2.Sb3#
        • 2.Qc3#
      • 1...Qxa2
        • 2.Sxa2#
        • 2.Qc3#
      • 1...Qb1
        • 2.Sb3#
        • 2.Rc2#
      • 1...Qxb2+!
  • Keys
    • 1.Qb3!
      • 1...Qxb2+
        • 2.Qxb2#
      • 1...Qxa2
        • 2.Sxa2#
      • 1...Sxb3
        • 2.Sxb3#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Qb1
        • 2.Rxb1#
      • 1...Sf3
        • 2.Qc2#
      • 1...Sf5
        • 2.Qc2#
      • 1...Sc6
        • 2.Qc2#
      • 1...Se6
        • 2.Qc2#
      • 1...e3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 6
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE,P_SPINQ(a),XR(C)::QAB1(D),XQ(a)
    • Q(a);N_PINR(C),SBLOCK::QAB(D)+R(C),DCHECK
    • Q(a);N_PINR(C),XP(B)::S(F),XQ(a)
    • S(e);N_GUARD::S(G)
    • S(e);N_GUARD::S(G),XS(e)
    • P(f);N_GUARD::S(F)
  • Tries
    • Try
      • K(E);S_FLIGHT,XS(e)
      • Threat
        • DUALS(2)
      • Refutation
        • Q(a);CHECK,P_SPINQ(a),XR(C)
  • Actual
    • Q(D);
    • Vars
      • Q(a);CHECK,OGATE,XR(C)::QAB1(D),XQ(a)
      • Q(a);N_PINR(C),XP(B)::S(F),XQ(a)
      • S(e);XQ(D)::S(G),XS(e)
      • S(e);N_GUARD::QAR1(D),XS(e)
      • Q(a);N_PINR(C)::R1(C),XQ(a)
      • S(e);N_GUARD::QAR1(D)
      • P(f);N_GUARD::S(F)
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