MESON Chess Problem Database

Problem Display
PID: 283856 (8/bq2Rp2/1r6/2QPBRp1/r3k1K1/3p4/b1P5/8 w - - 0 1)

Marker, Yuri

3rd Prize, 64 Shakhmatnoe obozrenie, 1983

8/bq2Rp2/1r6/2QPBRp1/r3k1K1/3p4/b1P5/8

#2

7 + 9

15601 Albrecht-Leiss-Degener Collection 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Bd6#
    • 1...Qc6
      • 2.Bd6#
    • 1...Qa8
      • 2.Bd6#
    • 1...Qb8
      • 2.Bd6#
    • 1...Ra3
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Ra5
      • 2.Qd4#
    • 1...Raa6
      • 2.Qd4#
    • 1...Rb1
      • 2.Bc7#
    • 1...Rb2
      • 2.Bc7#
    • 1...Rb3
      • 2.Bc7#
    • 1...Rb4
      • 2.Bc7#
    • 1...Rb5
      • 2.Bc7#
    • 1...Bc4
      • 2.Qd4#
  • Tries
    • 1.Bf4+?
      • 1...Qxe7
        • 2.Qe3#
      • 1...Re6!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxd3#
      • 1...Ke3+
        • 2.Bd4#
      • 1...Kxd5+
        • 2.Bf4#
      • 1...Qxd5
        • 2.Qe1#
      • 1...dxc2
        • 2.Qf3#
      • 1...Qa6
        • 2.Bd6#
      • 1...Ra3
        • 2.Qd4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Rb3
        • 2.Bc7#
      • 1...Bc4
        • 2.Qd4#
      • 1...d2
        • 2.Qd3#
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(h);N_GUARD::R(G)+B(E)
    • R(c);N_GUARD::QAR1(C)
    • R(c);N_GUARD::QAR1(C),XR(c)
    • R(f);N_GUARD::R(G)+B(E)
    • B(a);S_CUTR(c)::QAR1(C)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • Q(h);XR(G)::QAR1(C)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XP(b)
    • Vars
      • K(d);CHECK,P-FLIGHT,P_SPINP(b)::R(G)+B(E),DCHECK
      • K(d);CHECK,S_CUTQ(h),S_CUTR(f),S_FLIGHT,XP(D)::R(F)+B(E)
      • Q(h);SBLOCK,XP(D)::QAR(C)
      • P(b);OGATE,XP(A)::QAB1(C)
      • Q(h);N_GUARD::R(G)+B(E)
      • R(c);N_GUARD::QAR1(C)
      • R(c);N_GUARD::QAR1(C),XR(c)
      • R(f);N_GUARD::R(G)+B(E)
      • B(a);S_CUTR(c)::QAR1(C)
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