MESON Chess Problem Database

Problem Display
PID: 231130 (8/8/B7/Q7/8/1R6/4rk1K/5b2 w - - 0 1)

Hilbig, Fritz

Wiener Schachzeitung, 1927

(First published on Sat Jan 1 1927)

8/8/B7/Q7/8/1R6/4rk1K/5b2

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Qf5#
  • Tries
    • 1.Qd2?
      • 1...Bg2
        • 2.Qxe2#
      • 1...Bh3
        • 2.Qxe2#
      • 1...Rxd2!
    • 1.Qb6+?
      • 1...Re3
        • 2.Qxe3#
      • 1...Ke1+!
    • 1.Qb5?
      • 1...Re3
        • 2.Qxf1#
      • 1...Bg2
        • 2.Qxe2#
      • 1...Bh3
        • 2.Qxe2#
      • 1...Re1
        • 2.Qf5#
      • 1...Ra2
        • 2.Qxf1#
      • 1...Rb2
        • 2.Qxf1#
      • 1...Rc2
        • 2.Qxf1#
      • 1...Rd2
        • 2.Qxf1#
      • 1...Re4
        • 2.Qxf1#
      • 1...Re5
        • 2.Qxf1#
      • 1...Re6
        • 2.Qxf1#
      • 1...Re7
        • 2.Qxf1#
      • 1...Re8
        • 2.Qxf1#
      • 1...Ke1+!
    • 1.Qc5+?
      • 1...Re3
        • 2.Qxe3#
      • 1...Ke1+!
  • Keys
    • 1.Qa1!
      • 1...Re3
        • 2.Qxf1#
      • 1...Re1
        • 2.Qf6#
      • 1...Ra2
        • 2.Qxf1#
      • 1...Rb2
        • 2.Qxf1#
      • 1...Rc2
        • 2.Qxf1#
      • 1...Rd2
        • 2.Qxf1#
      • 1...Re4
        • 2.Qxf1#
      • 1...Re5
        • 2.Qxf1#
      • 1...Re6
        • 2.Qxf1#
      • 1...Re7
        • 2.Qxf1#
      • 1...Re8
        • 2.Qxf1#
      • 1...Bg2
        • 2.Qg1#
      • 1...Bh3
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::QAR(C)
  • Tries
    • Try
      • Q(C);P_PINR(b)
      • Vars
        • B(a);N_GUARD::QAR1(C),XR(b)
      • Refutation
        • R(b);N_SPINR(b),XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(C),XR(b)
      • Refutation
        • K(c);CHECK,S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • R(b);OGATE::QAR1(C),XB(a)
        • B(a);N_GUARD::QAR1(C),XR(b)
        • R(b);SBLOCK::QAR(C)
      • Refutation
        • K(c);CHECK,S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(C),XR(b)
      • Refutation
        • K(c);CHECK,S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • R(b);::QAR1(C),XB(a)
      • R(b);SBLOCK::QAR(C)
      • B(a);OGATE::QAB1(C)
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