MESON Chess Problem Database

Problem Display
PID: 161265 (8/B7/1K1Npr2/P1r1p3/3kB3/1P1N1p2/nPb1qP2/2RRQ3 w - - 0 1)

Archakov, Vladimir Mikhailovich

Schach, 1968

8/B7/1K1Npr2/P1r1p3/3kB3/1P1N1p2/nPb1qP2/2RRQ3

#2

12 + 9

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd1
      • 2.Qe3#
    • 1...Qf1
      • 2.Qe3#
    • 1...Qxd3
      • 2.Qe3#
    • 1...Qxf2
      • 2.Qxf2#
    • 1...Qe3
      • 2.Qxe3#
      • 2.fxe3#
    • 1...Qxe4
      • 2.Qxe4#
    • 1...Rxa5
      • 2.Kxa5#
    • 1...Rb5+
      • 2.Kxb5#
    • 1...Rc6+
      • 2.Kxc6#
    • 1...Rc7
      • 2.Kxc7#
  • Tries
    • 1.Kb7?
      • threat
        • 2.Bxc5#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Qxd3
        • 2.Sb5#
        • 2.Qe3#
      • 1...Rf7+!
    • 1.Sxc5+?
      • 1...Qxd1
        • 2.Sb5#
        • 2.Qe3#
      • 1...Qd3
        • 2.Sb5#
        • 2.Qe3#
      • 1...Qd2
        • 2.Sb5#
        • 2.Qe3#
      • 1...Bd3
        • 2.Sb5#
        • 2.Rc4#
      • 1...Bxd1!
    • 1.Qb4+?
      • 1...Rc4
        • 2.Kb5#
        • 2.Ka6#
        • 2.Kb7#
        • 2.Qxc4#
      • 1...Sxb4!
    • 1.Qxe2?
      • threat
        • 2.Qe3#
      • 1...Rb5+
        • 2.Kxb5#
        • 2.Sxb5#
      • 1...Rc6+
        • 2.Kxc6#
      • 1...fxe2!
  • Keys
    • 1.Ka6!
      • threat
        • 2.Bxc5#
      • 1...Qxd3+
        • 2.Sb5#
      • 1...Bxd3+
        • 2.Rc4#
      • 1...Sb4+
        • 2.Qxb4#
      • 1...Qxe4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(c);OGATE,XR(B)::QAB1(C)
    • Q(c);OGATE::QAB1(C)
    • Q(c);OGATE,P_SPINQ(c),XS(G)::QAB1(C)
    • Q(c);OGATE,XP(E)::QAB(C),XQ(c)
    • Q(c);OGATE,XB(H)::QAR1(C),XQ(c)
    • R(f);XP(I)::B(L)+K(J),XR(f)
    • R(f);CHECK::B(L)+K(J),XR(f)
    • R(f);::B(L)+K(J),XR(f)
  • Tries
    • Try
      • K(J);P-FLIGHT,P_PINR(f)
      • Threat
        • B(L),XR(f)
      • Vars
        • Q(c);CHECK,OGATE,XB(H)::QAR1(C),XQ(c)
      • Refutation
        • R(i);CHECK
    • Try
      • S(G);CHECK,XR(f)
      • Refutation
        • B(b);XR(B)
    • Try
      • Q(C);CHECK
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);XQ(c)
      • Threat
        • QAB1(C)
      • Vars
        • R(f);CHECK::B(L)+K(J),XR(f)
      • Refutation
        • P(d);XQ(C)
  • Actual
    • K(J);P-FLIGHT,P_PINR(f),P_SPINS(G)
    • Threat
      • B(L),XR(f)
    • Vars
      • Q(c);CHECK,P_SPINQ(c),XS(G)::S(K)
      • B(b);CHECK,OGATE,P_SPINB(b),XS(G)::R1(A)
      • S(a);CHECK,N_GUARD::QAR2(C),XS(a)
      • Q(c);N_PINS(G),OGATE,XB(H)::QAR1(C),XQ(c)
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