MESON Chess Problem Database

Problem Display
PID: 274082 (2Q1b3/8/1p6/1kp5/7R/2K5/8/8 w - - 0 1)

Zimmer, Eligiusz

Springaren, 2001

2Q1b3/8/1p6/1kp5/7R/2K5/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Rb4+?
      • 1...Ka5
        • 2.Qa8#
      • 1...cxb4+!
    • 1.Qd7+?
      • 1...Ka5
        • 2.Ra4#
      • 1...Ka6
        • 2.Ra4#
      • 1...Bxd7!
    • 1.Qxe8+?
      • 1...Ka5
        • 2.Ra4#
        • 2.Qa4#
      • 1...Ka6!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Qxe8#
      • 1...Kxa4
        • 2.Qa6#
      • 1...Bh5
        • 2.Qd7#
      • 1...Bc6
        • 2.Qa6#
      • 1...Bg6
        • 2.Qd7#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7
        • 2.Qd7#
      • 1...c4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT,S_CUTP(b)::QAR(C)
      • Refutation
        • P(b);CHECK,XR(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT,S_CUTB(d)::R1(B)
        • K(a);S_CUTB(d),S_FLIGHT::R(B)
      • Refutation
        • B(d);XQ(C)
    • Try
      • Q(C);CHECK,XB(d)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • QAB(C),XB(d)
    • Vars
      • K(a);N_GUARD,S_FLIGHT,XR(B)::QAR2(C)
      • B(d);N_GUARD::QAB(C)
      • B(d);SBLOCK::QAB1(C)
      • B(d);N_GUARD::QAB(C),XB(d)
      • P(b);OGATE::QAB1(C),XP(b)
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