MESON Chess Problem Database

Problem Display
PID: 47627 (n2Q2K1/q3p3/3pPp2/1P1k1N2/P4P2/r2P1p1B/b1N1RB2/2R1b3 w - - 0 1)

Barulin, Mikhail Mikhailovich

Greater Russian Ty., 1931

n2Q2K1/q3p3/3pPp2/1P1k1N2/P4P2/r2P1p1B/b1N1RB2/2R1b3

#2

13 + 10

6479 Problemschach (Sidler) 1968
3979 Systematic Terminology 1984
4640 Chess Wizardry: The New ABC of Chess Problems 1996
136 Problem Observer 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Sxe7#
    • 1...Qb6
      • 2.Sxe7#
    • 1...Qb8
      • 2.Sxe7#
    • 1...Qxa4
      • 2.Sxe7#
    • 1...Qa5
      • 2.Sxe7#
    • 1...Qa6
      • 2.Sxe7#
    • 1...Rc3
      • 2.Sb4#
    • 1...Bxf2
      • 2.Sb4#
    • 1...Bb4
      • 2.Sxb4#
    • 1...Sc7
      • 2.Sxe7#
  • Tries
    • 1.Sce3+?
      • 1...Kxe6
        • 2.Sd4#
        • 2.Sg7#
      • 1...Qxe3!
    • 1.Sfe3+?
      • 1...Kc5
        • 2.d4#
      • 1...Qxe3!
    • 1.Qxa8+?
      • 1...Qb7
        • 2.Sxe7#
        • 2.Qxb7#
      • 1...Qxa8+!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qc6#
      • 1...fxe2
        • 2.Bg2#
      • 1...Qe3
        • 2.Scxe3#
        • 2.Sfxe3#
        • 2.Sxe7#
      • 1...Qc5
        • 2.Sxe7#
      • 1...Qb6
        • 2.Sxe7#
      • 1...Qb8
        • 2.Sce3#
        • 2.Sfe3#
        • 2.Sxe7#
      • 1...Qa6
        • 2.Sce3#
        • 2.Sfe3#
        • 2.Sxe7#
      • 1...Qb7
        • 2.Sce3#
        • 2.Sfe3#
        • 2.Qxb7#
      • 1...Qc7
        • 2.Sce3#
      • 1...Qd7
        • 2.Sfe3#
      • 1...Rc3
        • 2.Sb4#
      • 1...Sc7
        • 2.Sxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(h);N_GUARD::S(J),XP(i)
    • Q(h);N_GUARD,P_PINQ(L)::S(J),XP(i)
    • Q(h);N_GUARD,XP(G)::S(J),XP(i)
    • R(c);S_CUTB(a)::S(B)
    • B(a);N_GUARD,XB(D)::S(B)
    • B(a);N_GUARD::S(B),XB(a)
    • S(j);S_CUTQ(h)::S(J),XP(i)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • Q(h);XS(B)
    • Try
      • S(J);CHECK
      • Vars
        • K(e);N_SPINP(f),P-FLIGHT,P_PINP(K)::P(E)
      • Refutation
        • Q(h);XS(J)
    • Try
      • Q(L);CHECK,N_PINP(f),XS(j)
      • Refutation
        • Q(h);CHECK,XQ(L)
  • Actual
    • Q(L);N_PINP(f)
    • Threat
      • QAB1(L)
    • Vars
      • P(d);OGATEB,XR(C)::B(F)
      • Q(h);N_GUARD::S(J),XP(i)
      • Q(h);N_GUARD::S(B)
      • Q(h);N_GUARD::S(J)
      • R(c);S_CUTB(a)::S(B)
      • S(j);S_CUTQ(h)::S(J),XP(i)
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