MESON Chess Problem Database

Problem Display
PID: 177825 (Q5b1/2pNp3/3b4/2pPP1K1/4k3/5R2/1B2P1n1/8 w - - 0 1)

Stakheev, Alexey

Sahs (Latvia), 1983

Q5b1/2pNp3/3b4/2pPP1K1/4k3/5R2/1B2P1n1/8

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Sxc5#
    • 1...Se3
      • 2.Rf4#
    • 1...e6
      • 2.Sf6#
  • Tries
    • 1.Qa4+?
      • 1...c4
        • 2.Qxc4#
      • 1...Kxd5!
    • 1.Qa6?
      • threat
        • 2.Qd3#
        • 2.Qc4#
      • 1...Bxe5
        • 2.Qd3#
      • 1...Bxd5
        • 2.Qd3#
      • 1...Se1
        • 2.Qc4#
      • 1...Se3
        • 2.Qd3#
      • 1...Sf4
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#
      • 1...Kxd5!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qc4#
      • 1...Bxe5
        • 2.Sxc5#
      • 1...Bxd5
        • 2.Qb1#
      • 1...c4
        • 2.Qxc4#
      • 1...Se3
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(d);N_GUARD,XP(E)::S(G),XP(c)
    • S(a);N_GUARD,SBLOCK::R1(C)
    • P(f);N_GUARD::S(G)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAR2(H),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XP(D)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(d);XP(E)::QAB1(H)
        • B(g);XP(D)::QAB1(H)
        • S(a);::QAR2(H)
        • S(a);::QAB1(H)
        • P(c);::QAR2(H),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XP(D)
  • Actual
    • Q(H);
    • Threat
      • QAR2(H)
    • Vars
      • B(d);N_GUARD,XP(E)::S(G),XP(c)
      • B(g);SBLOCK,XP(D)::QAB(H)
      • P(c);::QAR2(H),XP(c)
      • S(a);N_GUARD,SBLOCK::R1(C)
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