MESON Chess Problem Database

Problem Display
PID: 272351 (3K3B/8/3R1p2/3NR1Q1/1P1k3b/1P6/4rp2/8 w - - 0 1)

Rindoien, Ragnar

Prize, Schackvarlden, 1934

3K3B/8/3R1p2/3NR1Q1/1P1k3b/1P6/4rp2/8

#2

8 + 5

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qe3#
    • 1...Rb2
      • 2.Qe3#
    • 1...Rc2
      • 2.Qe3#
    • 1...Rd2
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...fxg5
      • 2.Re3#
    • 1...f5
      • 2.Re3#
  • Tries
    • 1.Qd2+?
      • 1...Kxe5
        • 2.Qf4#
      • 1...Rxd2!
    • 1.Qf4+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Kd3!
    • 1.Qxh4+?
      • 1...Kxe5
        • 2.Qf4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Kd3!
    • 1.Qg4+?
      • 1...Kxe5
        • 2.Qf4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Kd3!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qc3#
      • 1...fxe5+
        • 2.Sf6#
      • 1...f5+
        • 2.Se7#
      • 1...Kd3
        • 2.Sc3#
        • 2.Se3#
        • 2.Sf4#
        • 2.Sb6#
        • 2.Sxf6#
        • 2.Sc7#
        • 2.Se7#
        • 2.Qc3#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Rxe5
        • 2.Qc4#
      • 1...Rc2
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::QAB1(E)
    • R(a);N_GUARD::QAB1(E),XR(a)
    • P(e);OGATEB,XQ(E)::B(H)+R(D)
    • P(e);OGATEB,P_PINQ(E)::B(H)+R(D)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);N_GUARD,P_SPINP(e),S_CUTR(a),S_FLIGHT,XR(D)::QAB1(E)
      • Refutation
        • R(a);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(E),XR(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(E);CHECK,XB(d)
      • Vars
        • K(c);N_GUARD,P_SPINP(e),S_CUTR(a),S_FLIGHT,XR(D)::QAB1(E)
        • R(a);N_GUARD,P_SPINR(a)::QAR1(E),XR(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);N_GUARD,P_SPINP(e),S_CUTR(a),S_FLIGHT,XR(D)::QAB1(E)
        • R(a);N_GUARD,P_SPINR(a)::QAR1(E),XR(a)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • P(e);CHECK,P_SPINP(e),SBLOCK,XR(D)::R(F)+S(C)
      • P(e);CHECK::R(F)+S(C)
      • K(c);N_GUARD,P_SPINP(e),S_CUTR(a),S_FLIGHT,XR(D)::QAB1(E)
      • R(a);SBLOCK,XR(D)::QAR1(E)
      • R(a);N_GUARD::QAB1(E)
      • R(a);N_GUARD::QAB1(E),XR(a)
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