MESON Chess Problem Database

Problem Display
PID: 12110 (8/8/6B1/8/1q3B2/4Q3/3R4/2k1K3 w - - 0 1)

Svedberg, Erik Daniel

Tidskrift for Schack, 1974

8/8/6B1/8/1q3B2/4Q3/3R4/2k1K3

#2

5 + 2

3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd2+
      • 2.Qxd2#
    • 1...Qa3
      • 2.Qxa3#
    • 1...Qc3
      • 2.Qxc3#
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qd6
      • 2.Qc3#
    • 1...Qf8
      • 2.Ra2#
      • 2.Re2#
      • 2.Rf2#
      • 2.Rg2#
      • 2.Rh2#
      • 2.Qc3#
    • 1...Qb1
      • 2.Ra2#
      • 2.Rc2#
      • 2.Re2#
      • 2.Rf2#
      • 2.Rg2#
      • 2.Rh2#
    • 1...Qb2
      • 2.Rd1#
    • 1...Qa4
      • 2.Ra2#
      • 2.Re2#
      • 2.Rf2#
      • 2.Rg2#
      • 2.Rh2#
    • 1...Qc4
      • 2.Ra2#
      • 2.Re2#
      • 2.Rf2#
      • 2.Rg2#
      • 2.Rh2#
      • 2.Qa3#
    • 1...Qxf4
      • 2.Qa3#
      • 2.Qc3#
    • 1...Qb5
      • 2.Ra2#
      • 2.Re2#
      • 2.Rf2#
      • 2.Rg2#
      • 2.Rh2#
      • 2.Qc3#
    • 1...Qb6
      • 2.Qc3#
    • 1...Qb7
      • 2.Ra2#
      • 2.Re2#
      • 2.Rf2#
      • 2.Rg2#
      • 2.Rh2#
      • 2.Qc5#
      • 2.Qc3#
    • 1...Qb8
      • 2.Ra2#
      • 2.Re2#
      • 2.Rf2#
      • 2.Rg2#
      • 2.Rh2#
      • 2.Qc5#
      • 2.Qc3#
  • Tries
    • 1.Qc5+?
      • 1...Qc3
        • 2.Qxc3#
      • 1...Qc4
        • 2.Ra2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Qa3#
        • 2.Qxc4#
      • 1...Qxc5!
    • 1.Qa3+?
      • 1...Qb2
        • 2.Rd1#
        • 2.Rxb2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Rd4#
        • 2.Rd5#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rd8#
        • 2.Qxb2#
      • 1...Qxa3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qd1#
      • 1...Qxd2+
        • 2.Qxd2#
      • 1...Qe4
        • 2.Rd1#
      • 1...Qe7
        • 2.Rd1#
      • 1...Qb3
        • 2.Rd1#
      • 1...Qa4
        • 2.Rd1#
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XR(B)::QAB1(C),XQ(b)
    • Q(b);N_GUARD,N_PINR(B)::QAB(C),XQ(b)
    • Q(b);N_GUARD::QAR2(C),XQ(b)
    • Q(b);N_GUARD,N_PINR(B)::QAR(C),XQ(b)
    • Q(b);N_GUARD,N_PINR(B)::QAR2(C)
    • Q(b);N_PINR(B),SBLOCK::QAB(C)+R(B),DCHECK
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(C),XQ(b)
      • Refutation
        • Q(b);N_PINR(B),XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • Q(b);N_PINR(B),XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XR(B)::QAB1(C),XQ(b)
      • Q(b);N_PINR(B),P_PINQ(C)::B(D)+R(B),DCHECK
      • Q(b);N_PINR(B)::B(D)+R(B),DCHECK
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