MESON Chess Problem Database
Problem Display
PID: 168450 (4R2B/8/2PQ4/1p4p1/1P4P1/N2P4/N1qkP3/1B2RK2 w - - 0 1)
Petite, Efren
5th Comm., Berlingozzo-Coutinho Festival, 1985
#2
13 + 4
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxb1
- 2.Bc3#
- 1...Qd1
- 2.Bc3#
- 1...Qxd3
- 2.Bc3#
- 2.Qxd3#
- 1...Qa4
- 2.Bc3#
- 1...Qc3
- 2.Bxc3#
- 1...Qc4
- 2.dxc4#
- 1...Qxb1
- Tries
- 1.Sc4+?
- 1...Qxc4
- 2.dxc4#
- 1...bxc4!
- 1...Qxc4
- 1.Qg3?
- threat
- 2.Qe3#
- 1...Qxd3
- 2.Qxd3#
- 1...Qc5!
- threat
- 1.Qc5?
- threat
- 2.Qe3#
- 2.Qxc2#
- 2.Qxg5#
- 1...Qxb1
- 2.Sxb1#
- 2.Bc3#
- 2.Qe3#
- 2.Qc3#
- 2.Qxg5#
- 1...Qxd3
- 2.Qc1#
- 1...Qxa2
- 2.Bc3#
- 2.Qe3#
- 2.Qc1#
- 2.Qc3#
- 2.Qxg5#
- 1...Qd1
- 2.Bc3#
- 2.Qe3#
- 2.Qc3#
- 2.Qxg5#
- 1...Qb3
- 2.Qe3#
- 2.Qc1#
- 2.Qxg5#
- 1...Qa4
- 2.Bc3#
- 2.Qe3#
- 2.Qc1#
- 2.Qc3#
- 2.Qxg5#
- 1...Qc1
- 2.Qe3#
- 2.Qxc1#
- 2.Qxg5#
- 1...Qb2
- 2.Qe3#
- 2.Qxg5#
- 1...Qc3
- 2.Bxc3#
- 2.Qe3#
- 2.Qxc3#
- 2.Qxg5#
- 1...Qc4
- 2.Qe3#
- 1...Qxc5!
- threat
- 1.Qd4?
- threat
- 2.Qe3#
- 1...Qxd3
- 2.Qxd3#
- 1...Qc5!
- threat
- 1.Qd5?
- threat
- 2.Qxg5#
- 1...Qxd3
- 2.Bc3#
- 2.Qxd3#
- 1...Qc4
- 2.dxc4#
- 1...Qc5!
- threat
- 1.Qd8?
- threat
- 2.Qxg5#
- 1...Qxd3
- 2.Bc3#
- 2.Qxd3#
- 1...Qc4
- 2.dxc4#
- 1...Qc5!
- threat
- 1.e3?
- 1...Qxd3+
- 2.Qxd3#
- 1...Qxb1
- 2.Bc3#
- 1...Qxa2
- 2.Qh2#
- 1...Qc5
- 2.Qh2#
- 1...Qd1
- 2.Bc3#
- 1...Qb3
- 2.Qh2#
- 1...Qa4
- 2.Bc3#
- 2.Qh2#
- 1...Qc1
- 2.Qh2#
- 1...Qb2
- 2.Qh2#
- 1...Qc3
- 2.Bxc3#
- 2.Qh2#
- 1...Qc4
- 2.Qh2#
- 2.dxc4#
- 1...Qxc6!
- 1...Qxd3+
- 1.e4?
- 1...Qxd3+
- 2.Qxd3#
- 1...Qxb1
- 2.Bc3#
- 1...Qxa2
- 2.Qh2#
- 1...Qxc6
- 2.Qh2#
- 1...Qd1
- 2.Bc3#
- 1...Qb3
- 2.Qh2#
- 1...Qa4
- 2.Bc3#
- 2.Qh2#
- 1...Qc1
- 2.Qh2#
- 1...Qb2
- 2.Qh2#
- 1...Qc3
- 2.Bxc3#
- 2.Qh2#
- 1...Qc4
- 2.Qh2#
- 2.dxc4#
- 1...Qc5!
- 1...Qxd3+
- 1.Sc4+?
- Keys
- 1.Qh2!
- 1...Qxb1
- 2.Bc3#
- 1...Qxd3
- 2.exd3#
- 1...Qxa2
- 2.e3#
- 2.e4#
- 1...Qxc6
- 2.e4#
- 1...Qc5
- 2.e3#
- 1...Qd1
- 2.Bc3#
- 1...Qb3
- 2.e3#
- 2.e4#
- 1...Qa4
- 2.Bc3#
- 2.e3#
- 2.e4#
- 1...Qc1
- 2.e3#
- 2.e4#
- 1...Qb2
- 2.e3#
- 2.e4#
- 1...Qc3
- 2.Bxc3#
- 2.e3#
- 2.e4#
- 1...Qc4
- 2.e3#
- 2.e4#
- 1...Qxb1
- 1.Qh2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(a);N_GUARD,P_PINR(B),XB(A)::B(M)
- Q(a);N_GUARD,P_PINR(B)::B(M)
- Q(a);N_GUARD::B(M)
- Q(a);N_GUARD::B(M),XQ(a)
- Q(a);OGATE::QAR(K)+P(G),XQ(a)
- Tries
- Try
- S(F);CHECK
- Vars
- Q(a);OGATE,XS(F)::QAR(K)+P(G),XQ(a)
- Refutation
- P(c);XS(F)
- Try
- Q(K);
- Threat
- QAB1(K)
- Vars
- Q(a);OGATE,P_PINP(E),XP(G)::QAR1(K),XQ(a)
- Refutation
- Q(a);
- Try
- Q(K);
- Threat
- DUALS(3)
- Vars
- Q(a);OGATE,P_PINP(E),XP(G)::QAB1(K)
- Q(a);::QAB1(K)
- Refutation
- Q(a);XQ(K)
- Try
- Q(K);
- Threat
- QAB1(K)
- Vars
- Q(a);OGATE,P_PINP(E),P_SPINQ(a),XP(G)::QAR1(K),XQ(a)
- Refutation
- Q(a);
- Try
- Q(K);
- Threat
- QAB(K),XP(d)
- Vars
- Q(a);OGATE::QAR(K)+P(G),XQ(a)
- Refutation
- Q(a);
- Try
- Q(K);
- Threat
- QAB(K),XP(d)
- Vars
- Q(a);OGATE::QAR(K)+P(G),XQ(a)
- Refutation
- Q(a);
- Try
- P(E);
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XP(G)::QAR1(K),XQ(a)
- Q(a);N_GUARD,P_PINR(B),XB(A)::B(M)
- Q(a);XS(D)::QAR(K)
- Q(a);::QAR(K)
- Q(a);N_GUARD,P_PINR(B)::B(M)
- Q(a);P_PINR(B)::QAR(K)
- Refutation
- Q(a);XP(J)
- Try
- P(E);
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XP(G)::QAR1(K),XQ(a)
- Q(a);N_GUARD,P_PINR(B),XB(A)::B(M)
- Q(a);XS(D)::QAR(K)
- Q(a);XP(J)::QAR(K)
- Q(a);N_GUARD,P_PINR(B)::B(M)
- Q(a);::QAR(K)
- Q(a);P_PINR(B)::QAR(K)
- Refutation
- Q(a);
- Try
- Actual
- Q(K);
- Vars
- Q(a);N_GUARD,P_PINR(B),XB(A)::B(M)
- Q(a);OGATE,P_PINP(E),XP(G)::QAR(K)+P(E),XQ(a)
- Q(a);XP(J)::QAR(K)+P(E)
- Q(a);::QAR(K)+P(E)
- Q(a);N_GUARD,P_PINR(B)::B(M)
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).