MESON Chess Problem Database

Problem Display
PID: 227483 (8/8/8/K7/4Q3/2p5/2R5/3kBb2 w - - 0 1)

Leopold, Dr Rudolf L

Allgemeine Zeitung Chemnitz, 1926

8/8/8/K7/4Q3/2p5/2R5/3kBb2

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Qxe2#
    • 1...Bg2
      • 2.Qe2#
    • 1...Bh3
      • 2.Qe2#
  • Tries
    • 1.Rd2+?
      • 1...Kc1
        • 2.Qc2#
      • 1...cxd2!
    • 1.Qb4?
      • threat
        • 2.Qb1#
      • 1...Kxe1
        • 2.Qb1#
      • 1...Kxc2!
    • 1.Qf4?
      • threat
        • 2.Qc1#
      • 1...Kxe1
        • 2.Qc1#
      • 1...Kxc2!
  • Keys
    • 1.Re2!
      • threat
        • 2.Qc2#
      • 1...Kc1
        • 2.Qc2#
      • 1...Bxe2
        • 2.Qb1#
      • 1...c2
        • 2.Qxc2#

FEATURES

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