MESON Chess Problem Database

Problem Display
PID: 110757 (8/3p4/1ppP3p/1Ppk2pr/2NP3p/3P2pB/4N1K1/Q7 w - - 0 1)

Tura, Waldemar

17th Place, Tidskrift for Schack, 1960

8/3p4/1ppP3p/1Ppk2pr/2NP3p/3P2pB/4N1K1/Q7

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...cxd4
      • 2.Qxd4#
    • 1...g4
      • 2.Sf4#
    • 1...cxb5
      • 2.Qa8#
  • Tries
    • 1.Kf1?
      • 1...cxd4
        • 2.Qxd4#
      • 1...cxb5
        • 2.Qa8#
      • 1...g4
        • 2.Sf4#
      • 1...g2+!
    • 1.Kg1?
      • 1...cxd4
        • 2.Qxd4#
      • 1...cxb5
        • 2.Qa8#
      • 1...g4
        • 2.Sf4#
      • 1...g2!
    • 1.Kh1?
      • 1...cxd4
        • 2.Qxd4#
      • 1...cxb5
        • 2.Qa8#
      • 1...g4
        • 2.Sf4#
      • 1...g2+!
    • 1.Bg4?
      • 1...cxd4
        • 2.Qxd4#
      • 1...cxb5
        • 2.Qa8#
      • 1...h3+!
    • 1.Bf5?
      • 1...cxd4
        • 2.Qxd4#
      • 1...cxb5
        • 2.Qa8#
      • 1...g4
        • 2.Sf4#
      • 1...h3+!
    • 1.Bxd7?
      • 1...cxd4
        • 2.Qxd4#
      • 1...cxb5
        • 2.Qa8#
      • 1...g4
        • 2.Sf4#
      • 1...h3+!
    • 1.Qb2?
      • 1...cxd4
        • 2.Qxd4#
      • 1...g4
        • 2.Sf4#
      • 1...cxb5!
    • 1.Qc3?
      • 1...cxd4
        • 2.Qxd4#
      • 1...g4
        • 2.Sf4#
      • 1...cxb5!
    • 1.Qg1?
      • threat
        • 2.Sc3#
      • 1...cxd4
        • 2.Qxd4#
      • 1...g4
        • 2.Sf4#
      • 1...cxb5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qf3#
        • 2.Qf5#
        • 2.Qf7#
      • 1...cxd4
        • 2.Qf5#
      • 1...cxb5
        • 2.Qf3#
      • 1...g4
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE,XP(G)::QAR1(A),XP(c)
    • P(e);N_GUARD::S(B)
    • P(h);OGATEB,XP(H)::QAB(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(c);OGATE,XP(G)::QAR1(A),XP(c)
        • P(h);OGATEB,XP(H)::QAB(A)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(a);CHECK
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(c);OGATE,XP(G)::QAR1(A),XP(c)
        • P(h);OGATEB,XP(H)::QAB(A)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(a);
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(c);OGATE,XP(G)::QAR1(A),XP(c)
        • P(h);OGATEB,XP(H)::QAB(A)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(a);CHECK
    • Try
      • B(E);
      • Vars
        • P(c);OGATE,XP(G)::QAR1(A),XP(c)
        • P(h);OGATEB,XP(H)::QAB(A)
      • Refutation
        • P(b);CHECK
    • Try
      • B(E);
      • Vars
        • P(c);OGATE,XP(G)::QAR1(A),XP(c)
        • P(h);OGATEB,XP(H)::QAB(A)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(b);CHECK
    • Try
      • B(E);XP(j)
      • Vars
        • P(c);OGATE,XP(G)::QAR1(A),XP(c)
        • P(h);OGATEB,XP(H)::QAB(A)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(A);
      • Vars
        • P(c);OGATE,XP(G)::QAR1(A),XP(c)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(h);XP(H)
    • Try
      • Q(A);
      • Vars
        • P(c);OGATE,XP(G)::QAR1(A),XP(c)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(h);XP(H)
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • P(c);OGATE,XP(G)::QAR1(A),XP(c)
        • P(e);N_GUARD::S(B)
      • Refutation
        • P(h);XP(H)
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • P(c);XP(G)::QAR2(A)
      • P(h);XP(H)::QAB(A)
      • P(e);::QAB(A)
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