MESON Chess Problem Database

Problem Display
PID: 184483 (3Q4/8/4BR2/6pN/3KPq2/4pk2/7R/8 w - - 0 1)

Servais, Albert

Bulletin Ouvrier des Echecs, 1948

3Q4/8/4BR2/6pN/3KPq2/4pk2/7R/8

#2

7 + 4

15601 Albrecht-Leiss-Degener Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6+
      • 2.Qxf6#
    • 1...g4
      • 2.Rxf4#
  • Tries
    • 1.Bh3?
      • 1...Qxf6+
        • 2.Qxf6#
      • 1...Qf5
        • 2.Rxf5#
      • 1...g4
        • 2.Rxf4#
      • 1...e2!
    • 1.Qa5?
      • 1...Qf5
        • 2.Qxf5#
      • 1...e2
        • 2.Qc3#
        • 2.Qa3#
      • 1...g4
        • 2.Rxf4#
      • 1...Qxf6+!
    • 1.Qc7?
      • 1...Qf5
        • 2.Qg3#
      • 1...e2
        • 2.Qc3#
      • 1...g4
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...Qxf6+!
    • 1.Qe7?
      • 1...Qxf6+
        • 2.Qxf6#
      • 1...e2
        • 2.Qa3#
      • 1...g4
        • 2.Rxf4#
      • 1...Qf5!
    • 1.Qd6?
      • 1...Qf5
        • 2.Qg3#
      • 1...e2
        • 2.Qa3#
      • 1...g4
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...Qxf6+!
    • 1.Qa8?
      • 1...Qxf6+
        • 2.e5#
      • 1...e2
        • 2.Qa3#
      • 1...g4
        • 2.Rxf4#
      • 1...Qf5!
    • 1.Qb8?
      • 1...Qf5
        • 2.Qg3#
      • 1...e2
        • 2.Qb3#
      • 1...g4
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...Qxf6+!
    • 1.Qf8?
      • 1...Qxf6+
        • 2.Qxf6#
      • 1...e2
        • 2.Qa3#
      • 1...g4
        • 2.Rxf4#
      • 1...Qf5!
  • Keys
    • 1.Qd5!
      • 1...Qxf6+
        • 2.e5#
      • 1...Qf5
        • 2.Qxf5#
      • 1...e2
        • 2.Qb3#
      • 1...g4
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,N_PINP(C),N_SPINQ(c),OGATE,XR(F)::QAR(G),XQ(c)
    • P(d);N_GUARD::R1(F),XQ(c)
  • Tries
    • Try
      • B(E);
      • Vars
        • Q(c);CHECK,N_PINP(C),N_SPINQ(c),OGATE,XR(F)::QAR(G),XQ(c)
        • Q(c);N_PINP(C),OGATEB::R(F),XQ(c)
        • P(d);N_GUARD::R1(F),XQ(c)
      • Refutation
        • P(a);
    • Try
      • Q(G);
      • Vars
        • Q(c);N_PINP(C),OGATEB::QAR2(G),XQ(c)
        • P(d);N_GUARD::R1(F),XQ(c)
      • Refutation
        • Q(c);CHECK,N_PINP(C),N_SPINQ(c),XR(F)
    • Try
      • Q(G);
      • Vars
        • Q(c);N_PINP(C),OGATE::QAR1(G)
        • P(a);OGATEB::QAR(G)
      • Refutation
        • Q(c);CHECK,N_PINP(C),N_SPINQ(c),XR(F)
    • Try
      • Q(G);
      • Vars
        • Q(c);CHECK,N_PINP(C),N_SPINQ(c),OGATE,XR(F)::QAR(G),XQ(c)
        • P(a);OGATEB::QAR(G)
        • P(d);N_GUARD::R1(F),XQ(c)
      • Refutation
        • Q(c);N_PINP(C)
    • Try
      • Q(G);
      • Vars
        • Q(c);N_PINP(C),OGATE::QAR1(G)
        • P(a);OGATEB::QAR(G)
      • Refutation
        • Q(c);CHECK,N_PINP(C),N_SPINQ(c),XR(F)
    • Try
      • Q(G);
      • Vars
        • Q(c);CHECK,N_PINP(C),N_SPINQ(c),XR(F)::QAB(G)+P(C)
        • P(a);OGATEB::QAR(G)
        • P(d);N_GUARD::R1(F),XQ(c)
      • Refutation
        • Q(c);N_PINP(C)
    • Try
      • Q(G);
      • Vars
        • Q(c);N_PINP(C),OGATE::QAR1(G)
        • P(a);OGATEB::QAR(G)
      • Refutation
        • Q(c);CHECK,N_PINP(C),N_SPINQ(c),XR(F)
    • Try
      • Q(G);
      • Vars
        • Q(c);CHECK,N_PINP(C),OGATE,XR(F)::QAR(G),XQ(c)
        • P(a);OGATEB::QAR(G)
        • P(d);N_GUARD::R1(F),XQ(c)
      • Refutation
        • Q(c);N_PINP(C)
  • Actual
    • Q(G);
    • Vars
      • Q(c);CHECK,N_PINP(C),N_SPINQ(c),XR(F)::QAB(G)+P(C)
      • Q(c);N_PINP(C),OGATEB::QAR2(G),XQ(c)
      • P(a);OGATEB::QAR(G)
      • P(d);N_GUARD::R1(F),XQ(c)
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