MESON Chess Problem Database

Problem Display
PID: 214072 (3q3k/R7/7K/8/8/8/8/7Q w - - 0 1)

Dormer, Gunter

1st Comm., Deutsche Schachzeitung, 1970

3q3k/R7/7K/8/8/8/8/7Q

#2

3 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa8
      • 2.Rxa8#
      • 2.Qxa8#
  • Tries
    • 1.Kg6+?
      • 1...Qh4
        • 2.Ra8#
      • 1...Kg8!
    • 1.Ra8?
      • threat
        • 2.Rxd8#
      • 1...Qf8+
        • 2.Rxf8#
      • 1...Qxa8
        • 2.Qxa8#
      • 1...Qb8
        • 2.Rxb8#
      • 1...Qc8
        • 2.Rxc8#
      • 1...Qe8
        • 2.Rxe8#
      • 1...Qg8
        • 2.Qa1#
      • 1...Kg8!
    • 1.Qa1+?
      • 1...Kg8
        • 2.Qg7#
      • 1...Qd4
        • 2.Ra8#
      • 1...Qf6+!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qxd8#
      • 1...Qf8+
        • 2.Qxf8#
      • 1...Kg8
        • 2.Qxd8#
      • 1...Qxa8
        • 2.Rxa8#
      • 1...Qb8
        • 2.Qxb8#
      • 1...Qc8
        • 2.Qxc8#
      • 1...Qe8
        • 2.Qxe8#
      • 1...Qg8
        • 2.Rh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);CHECK,P-FLIGHT
      • Vars
        • Q(a);P_SPINQ(a)::R(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(C);P_PINQ(a)
      • Threat
        • R(C),XQ(a)
      • Vars
        • Q(a);CHECK,OGATE::R(C),XQ(a)
        • Q(a);N_SPINQ(a),OGATE,XR(C)::QAB1(A),XQ(a)
        • Q(a);OGATEB::R(C),XQ(a)
        • Q(a);OGATE::R(C),XQ(a)
        • Q(a);::QAB(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • Q(a);P_SPINQ(a)::R(C)
      • Refutation
        • Q(a);CHECK,P_SPINQ(a)
  • Actual
    • Q(A);P_PINQ(a)
    • Threat
      • QAR(A),XQ(a)
    • Vars
      • Q(a);CHECK,OGATE::QAR2(A),XQ(a)
      • K(b);P-FLIGHT::QAR(A),XQ(a)
      • Q(a);N_SPINQ(a),OGATE,XQ(A)::R(C),XQ(a)
      • Q(a);OGATEB::QAR(A),XQ(a)
      • Q(a);OGATE::QAR(A),XQ(a)
      • Q(a);::R1(C)
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