MESON Chess Problem Database

Problem Display
PID: 173710 (8/p7/Q7/8/8/5K1p/7p/5Rqk w - - 0 1)

Boros, Sandor

Schonberger, Tibor

Uj Nemezdek, 1926

8/p7/Q7/8/8/5K1p/7p/5Rqk

#2

3 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf1+
      • 2.Qxf1#
  • Tries
    • 1.Ke4?
      • 1...Qxf1
        • 2.Qxf1#
      • 1...Kg2!
    • 1.Kf4?
      • threat
        • 2.Qb7#
        • 2.Qc6#
      • 1...Qxf1+
        • 2.Qxf1#
      • 1...Kg2!
    • 1.Rb1?
      • 1...Qd1+
        • 2.Rxd1#
      • 1...Qf1+
        • 2.Rxf1#
        • 2.Qxf1#
      • 1...Qc1
        • 2.Rxc1#
      • 1...Qe1
        • 2.Rxe1#
      • 1...Qxb1!
    • 1.Rc1?
      • 1...Qd1+
        • 2.Rxd1#
      • 1...Qf1+
        • 2.Rxf1#
        • 2.Qxf1#
      • 1...Qe1
        • 2.Rxe1#
      • 1...Qxc1!
    • 1.Rd1?
      • 1...Qf1+
        • 2.Rxf1#
        • 2.Qxf1#
      • 1...Qe1
        • 2.Rxe1#
      • 1...Qxd1+!
    • 1.Re1?
      • 1...Qf1+
        • 2.Rxf1#
        • 2.Qxf1#
      • 1...Qxe1!
  • Keys
    • 1.Ra1!
      • 1...Qd1+
        • 2.Rxd1#
      • 1...Qf1+
        • 2.Rxf1#
        • 2.Qxf1#
      • 1...Qxa1
        • 2.Qxa1#
      • 1...Qb1
        • 2.Rxb1#
      • 1...Qc1
        • 2.Rxc1#
      • 1...Qe1
        • 2.Rxe1#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(a);CHECK,N_SPINQ(a),OGATE,XR(A)::QAR2(C),XQ(a)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • Q(a);N_SPINQ(a),OGATE,XR(A)::QAR2(C),XQ(a)
      • Refutation
        • K(b);N_SPINQ(a),S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,N_SPINQ(a),OGATE,XR(A)::QAR2(C),XQ(a)
      • Refutation
        • K(b);N_SPINQ(a),S_FLIGHT
    • Try
      • R(A);
      • Vars
        • Q(a);CHECK,OGATEB::R(A),XQ(a)
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XR(A)
    • Try
      • R(A);
      • Vars
        • Q(a);CHECK,OGATEB::R(A),XQ(a)
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • Q(a);N_SPINQ(a),XR(A)
    • Try
      • R(A);
      • Vars
        • Q(a);OGATEB::R(A),XQ(a)
      • Refutation
        • Q(a);CHECK,N_SPINQ(a),XR(A)
    • Try
      • R(A);
      • Refutation
        • Q(a);N_SPINQ(a),XR(A)
  • Actual
    • R(A);
    • Vars
      • Q(a);CHECK,OGATEB::R(A),XQ(a)
      • Q(a);N_SPINQ(a),OGATE,XR(A)::QAB1(C),XQ(a)
      • Q(a);OGATEB::R(A),XQ(a)
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