MESON Chess Problem Database

Problem Display
PID: 144208 (2Qb4/rr2p3/k3P3/N1P3K1/1P4p1/N4p2/4q3/1R3B2 w - - 0 1)

Takacs, L

Magyar Sakkvilag, 1930

2Qb4/rr2p3/k3P3/N1P3K1/1P4p1/N4p2/4q3/1R3B2

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Bxd3#
    • 1...Qc4
      • 2.Bxc4#
    • 1...Qb5
      • 2.Bxb5#
    • 1...Ra8
      • 2.Qxb7#
    • 1...f2
      • 2.Bxe2#
  • Tries
    • 1.S5c4?
      • threat
        • 2.b5#
      • 1...Qd2+
        • 2.Sxd2#
      • 1...Qe3+
        • 2.Sxe3#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Qxc4
        • 2.Bxc4#
      • 1...Qb2
        • 2.Sxb2#
        • 2.Sd2#
      • 1...Ra8!
  • Keys
    • 1.S3c4!
      • threat
        • 2.b5#
      • 1...Qd2+
        • 2.Sxd2#
      • 1...Qe3+
        • 2.Sxe3#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Kb5
        • 2.Qc6#
      • 1...Qxc4
        • 2.Bxc4#
      • 1...Ra8
        • 2.Qxb7#
      • 1...Qb2
        • 2.Sxb2#
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(a);OGATE::B(B),XQ(a)
    • Q(a);OGATE,P_PINP(F)::B(B),XQ(a)
    • R(e);N_GUARD::QAB1(I),XR(f)
    • P(b);N_GUARD::B(B),XQ(a)
  • Tries
    • Try
      • S(E);N_PINQ(a)
      • Threat
        • P(D)
      • Vars
        • Q(a);CHECK::B(B)+S(E),XQ(a)
        • Q(a);OGATE,P_SPINQ(a),XS(E)::B(B),XQ(a)
      • Refutation
        • R(e);
  • Actual
    • S(C);N_PINQ(a)
    • Threat
      • P(D)
    • Vars
      • Q(a);CHECK::B(B)+S(C),XQ(a)
      • K(d);N_SPINR(f),S_FLIGHT::QAB1(I)
      • Q(a);OGATE,P_SPINQ(a),XS(C)::B(B),XQ(a)
      • R(e);N_GUARD::QAB1(I),XR(f)
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