MESON Chess Problem Database

Problem Display
PID: 9811 (b7/pR1p4/k7/8/p1R1B3/rpQ2K2/8/8 w - - 0 1)

Kohnlein, Friedrich

Frankisches Volksblatt, 1910

b7/pR1p4/k7/8/p1R1B3/rpQ2K2/8/8

#2

5 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Rc5?
      • threat
        • 2.Ra5#
        • 2.Qa5#
        • 2.Qd3#
        • 2.Qc4#
      • 1...Bxb7
        • 2.Qa5#
      • 1...b2
        • 2.Ra5#
      • 1...d5!
    • 1.Rc6+?
      • 1...Kxb7
        • 2.Qb4#
      • 1...dxc6!
    • 1.Rxa7+?
      • 1...Kb5
        • 2.Rb4#
        • 2.Qb4#
      • 1...Kb6
        • 2.Qa5#
      • 1...Kxa7!
    • 1.Qb4?
      • threat
        • 2.Qb5#
      • 1...Bxb7
        • 2.Bxb7#
      • 1...b2+!
    • 1.Qf6+?
      • 1...Ka5
        • 2.Rc5#
      • 1...d6!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Rc7#
      • 1...Bxb7+
        • 2.Rc6#
      • 1...Kxb7
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(4)
      • Vars
        • B(g);P_PINB(D),XR(E)::QAR1(A)
        • P(b);P_PINQ(A)::R1(C)
      • Refutation
        • P(f);
    • Try
      • R(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(E)::QAR(A)
      • Refutation
        • P(f);XR(C)
    • Try
      • R(E);CHECK,P_SPINB(D),XP(e)
      • Vars
        • K(d);P-FLIGHT::QAB1(A)
      • Refutation
        • K(d);P-FLIGHT,XR(E)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(g);OGATE,P_PINB(D),XR(E)::B(D),XB(g)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::R(C)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • B(D);P_SPINR(E)
    • Threat
      • B(D)+R(C)
    • Vars
      • B(g);CHECK,SBLOCK,XR(E)::B(D)+R(C),DCHECK
      • K(d);S_FLIGHT,XR(E)::R(C)
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