MESON Chess Problem Database

Problem Display
PID: 115616 (3r4/6p1/p7/Kb6/7Q/NpkPRN2/n7/b1Br4 w - - 0 1)

Dombrovskis, Alfreds A

Latvian Championship, 1951

3r4/6p1/p7/Kb6/7Q/NpkPRN2/n7/b1Br4

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qxe1#
    • 1...R1xd3
      • 2.Qe1#
    • 1...R8xd3
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Ra8
      • 2.Qd4#
    • 1...Rb8
      • 2.Qd4#
    • 1...Rc8
      • 2.Qd4#
    • 1...Re8
      • 2.Qd4#
    • 1...Rf8
      • 2.Qd4#
    • 1...Rg8
      • 2.Qd4#
    • 1...Rh8
      • 2.Qd4#
    • 1...Bxd3
      • 2.Qc4#
    • 1...Ba4
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Bc6
      • 2.Qc4#
    • 1...Bd7
      • 2.Qc4#
      • 2.Qd4#
    • 1...Be8
      • 2.Qc4#
    • 1...Sb4
      • 2.Qxb4#
  • Tries
    • 1.Qe1+?
      • 1...Rd2
        • 2.Qxd2#
      • 1...Rxe1!
    • 1.Qf6+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...gxf6!
    • 1.d4+?
      • 1...Rd3
        • 2.Qe1#
      • 1...Bd3!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Sb1#
      • 1...Rxc1
        • 2.Qd2#
      • 1...R1xd3
        • 2.Qd2#
      • 1...R8xd3
        • 2.Qe5#
      • 1...Bxd3
        • 2.Qc7#
      • 1...b2
        • 2.Qc2#
      • 1...Rd2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 14
  • Sets
    • R(b);N_GUARD::QAB(F),XR(b)
    • R(b);N_GUARD,P_SPINR(b),XP(C)::QAB(F)
    • R(i);N_GUARD,P_SPINR(i),XP(C)::QAB1(F)
    • R(i);N_GUARD::QAB1(F),XR(i)
    • R(i);N_GUARD::QAB1(F)
    • B(f);N_GUARD,P_SPINB(f),XP(C)::QAR1(F)
    • B(f);N_GUARD::QAR1(F)
    • B(f);N_GUARD::QAR1(F),XB(f)
    • S(c);N_GUARD::QAB1(F),XS(c)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(F),XR(b)
      • Refutation
        • R(b);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAB1(F),XR(i)
      • Refutation
        • P(h);XQ(F)
    • Try
      • P(C);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB(F)
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • Q(F);
    • Threat
      • S(B)
    • Vars
      • R(b);N_GUARD,XB(A)::QAB1(F)
      • R(b);N_GUARD,P_SPINR(b),XP(C)::QAB1(F)
      • R(i);N_GUARD,P_SPINR(i),XP(C)::QAB(F)
      • B(f);N_GUARD,P_SPINB(f),XP(C)::QAR(F)
      • P(d);N_GUARD::QAR1(F)
      • R(b);N_GUARD::QAB1(F),XR(b)
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