MESON Chess Problem Database
Problem Display
PID: 176267 (8/3b4/1R1PpP2/3k4/pPN1NQp1/2B1PP2/2K1B1Pq/8 w - - 0 1)
Petkov, Petko Andonov
Schach-Echo, 1971
#2
13 + 6
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Qe5#
- 1...Qh1
- 2.Qe5#
- 1...Qxg2
- 2.Qe5#
- 1...Qh3
- 2.Qe5#
- 1...Qh4
- 2.Qe5#
- 1...Qh6
- 2.Qe5#
- 1...Qh7
- 2.Qe5#
- 1...Qh8
- 2.Qe5#
- 1...g3
- 2.Qe5#
- 1...Qg1
- Tries
- 1.Sb2?
- threat
- 2.Bc4#
- 1...Qxg2
- 2.Qe5#
- 1...Bb5!
- threat
- 1.Sa3?
- threat
- 2.Bc4#
- 1...Qxg2
- 2.Qe5#
- 1...Bb5!
- threat
- 1.Se5?
- threat
- 2.Bc4#
- 1...Bb5
- 2.Rxb5#
- 1...Qxg2!
- threat
- 1.Sg3?
- threat
- 2.Qe5#
- 2.Qd4#
- 2.Qe4#
- 2.e4#
- 1...Qxg3
- 2.Qd4#
- 2.Qe4#
- 2.e4#
- 1...e5
- 2.Qxe5#
- 1...Qh5
- 2.Qd4#
- 2.Qe4#
- 2.e4#
- 1...Qh7+!
- threat
- 1.Ba1?
- threat
- 2.Sc3#
- 1...Qh7
- 2.Qe5#
- 1...e5!
- threat
- 1.Be1?
- threat
- 2.Sc3#
- 1...Qh7
- 2.Qe5#
- 1...e5!
- threat
- 1.Bb2?
- threat
- 2.Sc3#
- 1...Qh7
- 2.Qe5#
- 1...e5!
- threat
- 1.Bd2?
- threat
- 2.Sc3#
- 1...Qh7
- 2.Qe5#
- 1...e5!
- threat
- 1.Bd4?
- threat
- 2.Sc3#
- 1...Qh7
- 2.Qe5#
- 1...e5!
- threat
- 1.Rb5+?
- 1...Kc6
- 2.Sa5#
- 2.Se5#
- 1...Bxb5!
- 1...Kc6
- 1.Qxh2?
- threat
- 2.Qe5#
- 1...e5
- 2.Qxe5#
- 1...g3!
- threat
- 1.Qg5+?
- 1...Qe5
- 2.Qxe5#
- 1...e5!
- 1...Qe5
- 1.Sb2?
- Keys
- 1.Sa5!
- threat
- 2.Bc4#
- 1...Qxg2
- 2.Qe5#
- 1...Bb5
- 2.Rxb5#
- threat
- 1.Sa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- Q(a);N_GUARD::QAR1(J)
- Q(a);N_GUARD,P_PINB(B),XP(C)::QAR1(J)
- Q(a);N_GUARD,P_PINS(I)::QAR1(J)
- P(c);S_CUTQ(a)::QAR1(J)
- Tries
- Try
- S(H);
- Threat
- B(B)
- Vars
- Q(a);N_GUARD,P_PINB(B),XP(C)::QAR1(J)
- Refutation
- B(f);
- Try
- S(H);
- Threat
- B(B)
- Vars
- Q(a);N_GUARD,P_PINB(B),XP(C)::QAR1(J)
- Refutation
- B(f);
- Try
- S(H);
- Threat
- B(B)
- Vars
- B(f);N_GUARD::R(K),XB(f)
- Refutation
- Q(a);P_PINB(B),XP(C)
- Try
- S(I);
- Threat
- DUALS(4)
- Vars
- P(e);::QAR1(J),XP(e)
- Refutation
- Q(a);CHECK
- Try
- B(D);
- Threat
- S(I)
- Vars
- Q(a);N_GUARD,P_PINS(I)::QAR1(J)
- Refutation
- P(e);
- Try
- B(D);
- Threat
- S(I)
- Vars
- Q(a);N_GUARD,P_PINS(I)::QAR1(J)
- Refutation
- P(e);
- Try
- B(D);
- Threat
- S(I)
- Vars
- Q(a);N_GUARD,P_PINS(I)::QAR1(J)
- Refutation
- P(e);
- Try
- B(D);
- Threat
- S(I)
- Vars
- Q(a);N_GUARD,P_PINS(I)::QAR1(J)
- Refutation
- P(e);
- Try
- B(D);
- Threat
- S(I)
- Vars
- Q(a);N_GUARD,P_PINS(I)::QAR1(J)
- Refutation
- P(e);
- Try
- R(K);CHECK
- Refutation
- B(f);XR(K)
- Try
- Q(J);XQ(a)
- Threat
- QAR1(J)
- Vars
- P(e);::QAR1(J),XP(e)
- Refutation
- P(c);
- Try
- Q(J);CHECK
- Vars
- Q(a);N_GUARD,P_SPINQ(a)::QAR1(J),XQ(a)
- Refutation
- P(e);P_SPINP(e)
- Try
- Actual
- S(H);
- Threat
- B(B)
- Vars
- Q(a);N_GUARD,P_PINB(B),XP(C)::QAR1(J)
- B(f);N_GUARD::R(K),XB(f)
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).