MESON Chess Problem Database

Problem Display
PID: 203308 (b4b1K/2B3n1/6Q1/3k4/4R3/2p5/2P1n3/8 w - - 0 1)

Lobel, Emil

2nd HM., Pfalzische Ty., 1924

b4b1K/2B3n1/6Q1/3k4/4R3/2p5/2P1n3/8

#2

5 + 6

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Re5+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc4!
    • 1.Qd6+?
      • 1...Kxe4
        • 2.Qd3#
      • 1...Bxd6!
    • 1.Qe6+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Sxe6!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qc4#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qc4#
      • 1...Bc5
        • 2.Qxa8#
      • 1...Sd4
        • 2.Re5#

Anticipated by 154149(1908)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XR(B)::QAB1(C)
      • Refutation
        • B(f);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • S(d);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(c);S_FLIGHT,XR(B)::QAB1(C)
      • K(c);P-FLIGHT::QAR1(C)
      • B(f);SBLOCK::QAB(C),XB(e)
      • S(a);SBLOCK::R1(B)
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