MESON Chess Problem Database
Problem Display
PID: 259683 (2Q2q2/r2n4/2P4b/pR2R3/P1k1N3/3rP3/K1NB4/4nB2 w - - 0 1)
Pirrone, Santi
3rd HM., Scacchi e Scienze Applicate 03. TT, 1987
#2
11 + 8
| 15601 | Albrecht-Leiss-Degener Collection | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qa3+
- 2.Sxa3#
- 1...Qb4
- 2.Qg8#
- 1...Qd6
- 2.Sxd6#
- 1...Qg7
- 2.Sa3#
- 2.Sd6#
- 1...Qf2
- 2.Sa3#
- 2.Sd6#
- 1...Qf3
- 2.Sa3#
- 2.Sd6#
- 1...Qf4
- 2.Sa3#
- 2.Sd6#
- 1...Qf5
- 2.Sa3#
- 2.Sd6#
- 1...Qf6
- 2.Sa3#
- 1...Qf7
- 2.Sa3#
- 2.Sd6#
- 1...Qxc8
- 2.Sa3#
- 2.Sd6#
- 1...Qd8
- 2.Sa3#
- 2.Sd6#
- 1...Qe8
- 2.Sa3#
- 2.Sd6#
- 1...Qg8
- 2.Sa3#
- 2.Sd6#
- 2.Qxg8#
- 1...Qh8
- 2.Sa3#
- 2.Sd6#
- 1...Sc5
- 2.Sa3#
- 1...Sxe5
- 2.Qe6#
- 1...Sb8
- 2.Qe6#
- 1...Qa3+
- Tries
- 1.Rb4+?
- 1...Qxb4
- 2.Qg8#
- 1...axb4!
- 1...Qxb4
- 1.Rbc5+?
- 1...Sxc5
- 2.Sa3#
- 1...Qxc5!
- 1...Sxc5
- 1.Rbd5?
- threat
- 2.Rd4#
- 1...Qa3+
- 2.Sxa3#
- 1...Qxf1
- 2.Sd6#
- 1...Bxe3
- 2.Sxe3#
- 1...Sxc2
- 2.Bxd3#
- 1...Qd6
- 2.Sxd6#
- 1...Sf3
- 2.Bxd3#
- 1...Qc5!
- threat
- 1.Qa6?
- threat
- 2.Rb4#
- 2.Rbc5#
- 1...Qa3+
- 2.Sxa3#
- 1...Sxe5
- 2.Rc5#
- 1...Qc5
- 2.Rb4#
- 2.Rbxc5#
- 1...Qb4
- 2.Rxb4#
- 2.Rbc5#
- 1...Sc5
- 2.Sa3#
- 2.Rb4#
- 2.Rbxc5#
- 1...Rxa6!
- threat
- 1.Qxd7?
- threat
- 2.Qe6#
- 2.Qd4#
- 2.Qd5#
- 1...Qa3+
- 2.Sxa3#
- 1...Qxf1
- 2.Rbc5#
- 2.Rec5#
- 1...Bxe3
- 2.Sxe3#
- 2.Qe6#
- 2.Qd5#
- 1...Sxc2
- 2.Bxd3#
- 2.Qe6#
- 2.Qxd3#
- 2.Qd5#
- 1...Qc5
- 2.Rbxc5#
- 2.Rexc5#
- 1...Qd6
- 2.Sxd6#
- 1...Qe7
- 2.Qd4#
- 2.Qd5#
- 1...Qf5
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Qd4#
- 2.Qd5#
- 1...Qf6
- 2.Sa3#
- 2.Rbc5#
- 2.Rec5#
- 2.Qd4#
- 2.Qd5#
- 1...Qf7
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Rec5#
- 2.Qd4#
- 1...Qc8
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Rec5#
- 2.Qd4#
- 2.Qd5#
- 1...Qd8
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Rec5#
- 1...Qe8
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Rec5#
- 2.Qd4#
- 2.Qd5#
- 1...Qg8
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Rec5#
- 2.Qd4#
- 1...Sf3
- 2.Bxd3#
- 2.Qe6#
- 2.Qxd3#
- 2.Qd5#
- 1...Rxd7!
- threat
- 1.Qxf8?
- threat
- 2.Sa3#
- 2.Sd6#
- 2.Qf7#
- 2.Qg8#
- 1...Bxe3
- 2.Sd6#
- 2.Qf7#
- 2.Qg8#
- 1...Sxc2
- 2.Sd6#
- 2.Qf7#
- 2.Qg8#
- 1...Sxe5
- 2.Sa3#
- 2.Sd6#
- 2.Rc5#
- 2.Qc5#
- 1...Sxf8
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Rec5#
- 1...Ra8
- 2.Sa3#
- 2.Sd6#
- 2.Qf7#
- 1...Sc5
- 2.Sa3#
- 2.Sd6#
- 2.Rbxc5#
- 2.Rexc5#
- 2.Qxc5#
- 1...Sb6
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Rec5#
- 2.Qc5#
- 1...Sf6
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Rec5#
- 2.Qc5#
- 1...Sb8
- 2.Sa3#
- 2.Sd6#
- 2.Rbc5#
- 2.Rec5#
- 2.Qc5#
- 1...Bxf8!
- threat
- 1.cxd7+?
- 1...Qc5
- 2.Sa3#
- 2.Sd6#
- 2.Rbxc5#
- 2.Rexc5#
- 2.Qxc5#
- 1...Qxc8
- 2.Sa3#
- 2.Sd6#
- 1...Rc7!
- 1...Qc5
- 1.Rb4+?
- Keys
- 1.Rb3!
- threat
- 2.Rc3#
- 1...Qa3+
- 2.Sxa3#
- 1...Qxf1
- 2.Sa3#
- 1...Sxc2
- 2.Bxd3#
- 1...Sxe5
- 2.Qe6#
- 1...Qb4
- 2.Qg8#
- threat
- 1.Rb3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- Q(h);CHECK,N_GUARD::S(C),XQ(h)
- Q(h);OGATE::QAB(K)
- Q(h);N_GUARD::S(G),XQ(h)
- Q(h);N_GUARD::S(C)
- S(g);S_CUTQ(h)::S(C)
- S(g);OGATE,XR(I)::QAB(K)
- S(g);OGATE::QAB(K)
- Tries
- Try
- R(H);CHECK
- Vars
- Q(h);OGATE,XR(H)::QAB(K)
- Refutation
- P(d);P_PINP(F),XR(H)
- Try
- R(H);CHECK
- Vars
- S(g);XR(H)::S(C)
- Refutation
- Q(h);XR(H)
- Try
- R(H);
- Threat
- R1(H)
- Vars
- Q(h);CHECK,N_GUARD::S(C),XQ(h)
- Q(h);N_GUARD,N_SPINR(b),XB(A)::S(G)
- B(e);XP(E)::S(C),XB(e)
- S(a);N_GUARD,XS(C)::B(A),XR(b)
- Q(h);N_GUARD::S(G),XQ(h)
- S(a);N_GUARD::B(A),XR(b)
- Refutation
- Q(h);
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- Q(h);CHECK,N_GUARD::S(C),XQ(h)
- S(g);XR(I)::QAB(K)+R(H),DCHECK
- Refutation
- R(f);XQ(K)
- Try
- Q(K);XS(g)
- Threat
- DUALS(3)
- Vars
- Q(h);CHECK,N_GUARD::S(C),XQ(h)
- Q(h);N_GUARD::S(G),XQ(h)
- Refutation
- R(f);XQ(K)
- Try
- Q(K);XQ(h)
- Threat
- DUALS(4)
- Refutation
- B(e);XQ(K)
- Try
- P(J);CHECK,XS(g)
- Refutation
- R(f);
- Try
- Actual
- R(H);
- Threat
- R1(H)
- Vars
- Q(h);CHECK,N_GUARD::S(C),XQ(h)
- Q(h);N_GUARD,N_SPINR(b),XB(A)::S(C)
- S(a);N_GUARD,XS(C)::B(A),XR(b)
- S(g);OGATE,XR(I)::QAB(K)
- Q(h);OGATE::QAB(K)
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).