MESON Chess Problem Database

Problem Display
PID: 252937 (8/8/8/8/8/5QBK/1Rpk4/8 w - - 0 1)

Nemo, Ottmar (Weiss, Ottmar)

Die Schwalbe, 1930

8/8/8/8/8/5QBK/1Rpk4/8

#2

4 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Be5?
      • 1...Ke1
        • 2.Bc3#
      • 1...Kc1!
    • 1.Bd6?
      • 1...Ke1
        • 2.Bb4#
      • 1...Kc1!
    • 1.Bc7?
      • 1...Ke1
        • 2.Ba5#
      • 1...Kc1!
    • 1.Qe2+?
      • 1...Kc1
        • 2.Qxc2#
      • 1...Kc3
        • 2.Be5#
      • 1...Kxe2!
    • 1.Qe4?
      • 1...Kc1
        • 2.Qxc2#
      • 1...Kd1
        • 2.Qxc2#
        • 2.Qe1#
      • 1...Kc3!
    • 1.Qb3?
      • 1...Kc1
        • 2.Qxc2#
      • 1...Kd1
        • 2.Qxc2#
      • 1...Ke2!
    • 1.Qd3+?
      • 1...Kc1
        • 2.Qxc2#
      • 1...Kxd3!
    • 1.Qe3+?
      • 1...Kd1
        • 2.Qe1#
      • 1...Kxe3!
  • Keys
    • 1.Rb3!
      • 1...Kc1
        • 2.Bf4#
      • 1...c1Q
        • 2.Qd3#
      • 1...c1S
        • 2.Rb2#
      • 1...c1B
        • 2.Qd3#
      • 1...c1R
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);
      • Vars
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::B(C)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::B(C)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::B(C)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_SPINP(a),OGATE,S_FLIGHT::QAR1(B),XP(a)
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::B(C)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::QAR1(B),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::QAR1(B),XP(a)
        • K(b);N_GUARD,P-FLIGHT::QAB1(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINP(a),S_FLIGHT::QAR1(B),XP(a)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XQ(B)
  • Actual
    • R(A);N_PINP(a)
    • Vars
      • K(b);N_GUARD,S_FLIGHT::B(C)
      • P(a);SBLOCK::QAR1(B)
      • P(a);OGATEB,SBLOCK::R(A)
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