MESON Chess Problem Database
Problem Display
PID: 225706 (6b1/2p1K3/5N2/1QB1k1n1/5pP1/1n2N3/8/r7 w - - 0 1)
Polacek, Ladislav
Praca, 1953
#2
6 + 7
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Bc4
- 2.Sxc4#
- 1...Bh7
- 2.Sc4#
- 1...Sc1
- 2.Qb2#
- 1...Sd2
- 2.Qb2#
- 1...Sd4
- 2.Bd6#
- 1...Sa5
- 2.Qb2#
- 1...Sxc5
- 2.Qb2#
- 1...Se4
- 2.Sd7#
- 1...Se6
- 2.Sc4#
- 1...Sf7
- 2.Sc4#
- 1...c6
- 2.Qb8#
- 1...Bc4
- Tries
- 1.Sc2?
- threat
- 2.Bd4#
- 2.Bd6#
- 1...Sxc5
- 2.Qb2#
- 1...f3
- 2.Bd6#
- 1...Sd4
- 2.Bxd4#
- 2.Bd6#
- 1...Bd5!
- threat
- 1.Sf5?
- threat
- 2.Bd4#
- 2.Bd6#
- 1...Sxc5
- 2.Qb2#
- 1...f3
- 2.Bd6#
- 1...Sd4
- 2.Bxd4#
- 2.Bd6#
- 1...Bd5!
- threat
- 1.Bb4+?
- 1...Kd4
- 2.Sc2#
- 2.Sf5#
- 1...Bd5
- 2.Qxd5#
- 1...Sc5
- 2.Bc3#
- 1...c5!
- 1...Kd4
- 1.Bb6+?
- 1...Bd5
- 2.Sc4#
- 2.Qxd5#
- 1...Sc5
- 2.Qb2#
- 1...c5!
- 1...Bd5
- 1.Ba7+?
- 1...Bd5
- 2.Sc4#
- 2.Qxd5#
- 1...Sc5
- 2.Qb2#
- 1...c5!
- 1...Bd5
- 1.Qd3?
- threat
- 2.Sd7#
- 2.Qf5#
- 1...Sxc5
- 2.Qc3#
- 1...fxe3
- 2.Qf5#
- 1...f3
- 2.Qf5#
- 1...Bh7
- 2.Sc4#
- 2.Sd7#
- 2.Qd5#
- 1...Sd4
- 2.Sd7#
- 2.Bxd4#
- 2.Qxd4#
- 1...Se4
- 2.Sd7#
- 2.Qxe4#
- 1...Be6!
- threat
- 1.Qd7?
- threat
- 2.Qf5#
- 2.Qxc7#
- 1...Rd1
- 2.Qf5#
- 1...Ra6
- 2.Qf5#
- 1...Ra7
- 2.Qf5#
- 1...Be6
- 2.Qxc7#
- 1...Bh7
- 2.Sc4#
- 2.Qd5#
- 2.Qxc7#
- 1...Sd4
- 2.Bxd4#
- 2.Qxd4#
- 2.Qxc7#
- 1...Se4
- 2.Qf5#
- 1...Se6
- 2.Sc4#
- 2.Qd5#
- 1...Sf7
- 2.Sc4#
- 2.Qf5#
- 2.Qe6#
- 2.Qd5#
- 1...c6
- 2.Qf5#
- 2.Qd6#
- 2.Qc7#
- 1...Sxc5!
- threat
- 1.Qb7?
- threat
- 2.Sd7#
- 2.Qxc7#
- 1...Sxc5
- 2.Qb2#
- 1...fxe3
- 2.Qxc7#
- 1...f3
- 2.Qxc7#
- 1...Ra6
- 2.Sd7#
- 1...Ra7
- 2.Sd7#
- 1...Bd5
- 2.Qxd5#
- 2.Qxc7#
- 1...Be6
- 2.Qxc7#
- 1...Se4
- 2.Sd7#
- 2.Qxe4#
- 1...Se6
- 2.Sc4#
- 2.Sd7#
- 2.Qe4#
- 2.Qd5#
- 1...Sf7
- 2.Sc4#
- 2.Sd7#
- 2.Qe4#
- 2.Qd5#
- 1...c6
- 2.Qc7#
- 2.Qb8#
- 1...Rd1!
- threat
- 1.Sc2?
- Keys
- 1.Qe2!
- threat
- 2.Sc4#
- 1...Sxc5
- 2.Qb2#
- 1...fxe3
- 2.Qh2#
- 1...f3
- 2.Qh2#
- 1...Bc4
- 2.Sxc4#
- 1...Se4
- 2.Sd7#
- threat
- 1.Qe2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- B(g);N_GUARD::S(A),XB(g)
- B(g);N_GUARD::S(A)
- S(b);OGATE::QAB(C)
- S(b);SBLOCK::QAR(C)+B(D),DCHECK
- S(b);OGATE,P_SPINS(b),XB(D)::QAB(C)
- S(e);SBLOCK::S(E)
- S(e);S_CUTB(g)::S(A)
- P(f);OGATEB::QAB(C)
- Tries
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- S(b);OGATE,P_SPINS(b),XB(D)::QAB(C)
- P(c);::QAR(C)+B(D),DCHECK
- Refutation
- B(g);
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- S(b);OGATE,P_SPINS(b),XB(D)::QAB(C)
- P(c);::QAR(C)+B(D),DCHECK
- Refutation
- B(g);
- Try
- B(D);CHECK
- Vars
- B(g);N_GUARD,P_SPINB(g)::QAR1(C),XB(g)
- S(b);P_SPINS(b)::B(D)
- Refutation
- P(f);P_SPINP(f)
- Try
- B(D);CHECK
- Vars
- S(b);OGATE,P_SPINS(b)::QAB(C)
- Refutation
- P(f);P_SPINP(f)
- Try
- B(D);CHECK
- Vars
- S(b);OGATE,P_SPINS(b)::QAB(C)
- Refutation
- P(f);P_SPINP(f)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- S(b);N_GUARD,XB(D)::QAB(C)
- P(c);XS(A)::QAR1(C)
- P(c);::QAR1(C)
- Refutation
- B(g);
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- R(a);::QAR1(C)
- B(g);::QAB(C),XP(f)
- S(e);::QAR1(C)
- Refutation
- S(b);XB(D)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- S(b);OGATE,XB(D)::QAB(C)
- P(c);XS(A)::QAB(C),XP(f)
- P(c);::QAB(C),XP(f)
- R(a);::S(E)
- B(g);::QAB(C),XP(f)
- Refutation
- R(a);
- Try
- Actual
- Q(C);
- Threat
- QAR(C)+S(A),DCHECK
- Vars
- S(b);N_GUARD,XB(D)::QAB(C)
- P(c);OGATEB,P_SPINP(c),XS(A)::QAB(C)
- P(c);OGATEB::QAB(C)
- B(g);::QAR(C)+S(A),DCHECK,XB(g)
- S(e);SBLOCK::S(E)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).