MESON Chess Problem Database

Problem Display
PID: 228015 (8/7Q/8/8/6b1/8/2R5/K2kB2n w - - 0 1)

Leopold, Dr Rudolf L

Deutsche Schachzeitung, 1931

8/7Q/8/8/6b1/8/2R5/K2kB2n

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe1
      • 2.Qxh1#
  • Tries
    • 1.Rc1+?
      • 1...Kxc1
        • 2.Qb1#
      • 1...Ke2!
    • 1.Ra2?
      • threat
        • 2.Qb1#
      • 1...Kc1
        • 2.Qb1#
        • 2.Qc2#
      • 1...Kxe1
        • 2.Qxh1#
      • 1...Bf5!
    • 1.Rb2?
      • threat
        • 2.Qb1#
      • 1...Kc1
        • 2.Rb1#
        • 2.Qb1#
        • 2.Qc2#
      • 1...Kxe1
        • 2.Qxh1#
      • 1...Bf5!
    • 1.Rd2+?
      • 1...Kc1
        • 2.Qb1#
        • 2.Qc2#
        • 2.Qc7#
      • 1...Kxe1!
    • 1.Qh2?
      • threat
        • 2.Qd2#
      • 1...Kxe1
        • 2.Qg1#
        • 2.Qxh1#
      • 1...Be2
        • 2.Qxe2#
      • 1...Sf2!
    • 1.Qh6?
      • threat
        • 2.Qc1#
        • 2.Qd2#
      • 1...Kxe1
        • 2.Qxh1#
      • 1...Kxc2!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb1#
      • 1...Kxe1
        • 2.Qxh1#
      • 1...Kxc2
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XB(B)::QAR(D),XS(b)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XR(C)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(B)::QAR(D),XS(b)
      • Refutation
        • B(c);
    • Try
      • R(C);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(B)::QAR(D),XS(b)
      • Refutation
        • B(c);
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XB(B)
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • B(c);N_GUARD::QAB1(D),XB(c)
      • Refutation
        • S(b);
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(B)::QAR(D),XS(b)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • Q(D);
    • Threat
      • QAR2(D)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XB(B)::QAR(D),XS(b)
      • K(a);S_FLIGHT,XR(C)::QAB1(D)
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