MESON Chess Problem Database

Problem Display
PID: 85693 (3Q4/N2P4/8/2pP4/1k6/R7/2K5/8 w - - 0 1)

Speckmann, Werner

Zeit-Magazin, 1972

3Q4/N2P4/8/2pP4/1k6/R7/2K5/8

#2

6 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa3
      • 2.Qa5#
    • 1...c4
      • 2.Qa5#
      • 2.Qe7#
      • 2.Qf8#
  • Tries
    • 1.Kb2?
      • 1...c4
        • 2.Qa5#
        • 2.Qb6#
        • 2.Qe7#
        • 2.Qf8#
      • 1...Kc4!
    • 1.Ra1?
      • 1...c4
        • 2.Qa5#
        • 2.Qb6#
        • 2.Qe7#
        • 2.Qf8#
      • 1...Kc4!
    • 1.Ra2?
      • 1...c4
        • 2.Qa5#
        • 2.Qb6#
        • 2.Qe7#
        • 2.Qf8#
      • 1...Kc4!
    • 1.Ra5?
      • 1...c4
        • 2.Sc6#
        • 2.Qb6#
      • 1...Kc4!
    • 1.Ra6?
      • 1...c4
        • 2.Qa5#
        • 2.Qb6#
        • 2.Qe7#
        • 2.Qf8#
      • 1...Kc4!
    • 1.Qh4+?
      • 1...c4
        • 2.Qe7#
      • 1...Kxa3!
    • 1.Qg5?
      • 1...Kc4
        • 2.Ra4#
      • 1...c4
        • 2.Qe7#
      • 1...Kxa3!
    • 1.Qb6+?
      • 1...Kxa3
        • 2.Qa5#
        • 2.Qb3#
      • 1...Kc4!
    • 1.Qc7?
      • 1...Kxa3
        • 2.Qa5#
      • 1...c4
        • 2.Qa5#
        • 2.Qd6#
      • 1...Kc4!
    • 1.Qe7?
      • 1...Kc4
        • 2.Qe4#
      • 1...Kxa3!
    • 1.Qb8+?
      • 1...Kxa3
        • 2.Qb3#
      • 1...Kc4!
    • 1.Qe8?
      • 1...Kc4
        • 2.Qe4#
      • 1...c4
        • 2.Qe7#
        • 2.Qf8#
      • 1...Kxa3!
    • 1.Qg8?
      • 1...Kc4
        • 2.Ra4#
      • 1...c4
        • 2.Qf8#
      • 1...Kxa3!
    • 1.d6?
      • 1...Kxa3
        • 2.Qa5#
      • 1...c4
        • 2.Qa5#
      • 1...Kc4!
  • Keys
    • 1.Qa8!
      • 1...Kxa3
        • 2.Sc6#
      • 1...Kc4
        • 2.Ra4#
      • 1...c4
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT,XR(B)::QAR2(F)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • P(b);OGATEB,P_SPINP(b),SBLOCK::QAB(F)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT::R(B)
        • P(b);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(F);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(B)::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT::R(B)
        • P(b);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • P(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR2(F)
        • P(b);SBLOCK::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR(F)+S(D)
      • K(a);P-FLIGHT::R(B)
      • P(b);OGATEB,SBLOCK::QAB(F)
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