MESON Chess Problem Database

Problem Display
PID: 173101 (r2r1R1B/1B3N1n/p4q2/1pP3P1/1P1k2b1/6K1/2Q2p2/5N2 w - - 0 1)

Barulin, Mikhail Mikhailovich

Zadachi i Etyudi, 1927

r2r1R1B/1B3N1n/p4q2/1pP3P1/1P1k2b1/6K1/2Q2p2/5N2

#2

10 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Bxe5#
    • 1...Sxg5
      • 2.Bxf6#
    • 1...Sxf8
      • 2.Bxf6#
  • Tries
    • 1.Be4?
      • threat
        • 2.Qd3#
      • 1...Qe5+
        • 2.Bxe5#
      • 1...Be2!
    • 1.Rxd8+?
      • 1...Bd7
        • 2.Rxd7#
      • 1...Rxd8!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qb2#
      • 1...Qxe5+
        • 2.Rf4#
      • 1...Qf3+
        • 2.Sxf3#
      • 1...Qf4+
        • 2.Rxf4#
      • 1...Kxe5
        • 2.Qe4#
      • 1...Qc6
        • 2.Qd3#
      • 1...Rd5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(f);CHECK,OGATE::B(J),XQ(f)
    • S(g);N_GUARD,XP(F)::B(J),XQ(f)
    • S(g);N_GUARD,XR(I)::B(J),XQ(f)
  • Tries
    • Try
      • B(G);
      • Threat
        • QAR1(B)
      • Vars
        • Q(f);CHECK,OGATE::B(J),XQ(f)
      • Refutation
        • B(c);
    • Try
      • R(I);CHECK,XR(i)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::R(I),XB(c)
      • Refutation
        • R(h);XR(I)
  • Actual
    • S(H);N_PINQ(f)
    • Threat
      • QAB(B)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINQ(f),XS(H)::R(I)
      • Q(f);CHECK::B(J)+S(H),DCHECK,XQ(f)
      • Q(f);CHECK,OGATE::R(I),XQ(f)
      • K(b);P_SPINQ(f),S_FLIGHT,XS(H)::QAR1(B)
      • Q(f);::QAR1(B)
      • R(i);SBLOCK::S(H)
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