MESON Chess Problem Database
Problem Display
PID: 121700 (4K3/2p1NpbB/1pr4q/Q1n3P1/p1Nk1PR1/1P1pr3/8/3n1bB1 w - - 0 1)
Stocchi, Ottavio
Caissa, 1948
#2
10 + 13
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sb2
- 2.Bxe3#
- 1...Sc3
- 2.Bxe3#
- 1...Sxb3
- 2.f5#
- 1...Se4
- 2.Sf5#
- 1...Sa6
- 2.f5#
- 1...Se6
- 2.Sxc6#
- 1...Sb7
- 2.f5#
- 1...Sd7
- 2.f5#
- 1...Sb2
- Tries
- 1.Sd2?
- threat
- 2.Sf3#
- 2.Qb4#
- 1...Qxh7
- 2.Qb4#
- 1...Sxb3
- 2.f5#
- 1...axb3
- 2.Qb4#
- 1...Qh1
- 2.Qb4#
- 1...Qh3
- 2.Qb4#
- 1...Qe6
- 2.Sf3#
- 1...Qg6
- 2.Qb4#
- 1...Rg6
- 2.Qb4#
- 1...Be2
- 2.Qb4#
- 1...Bg2
- 2.Qb4#
- 1...Sb2
- 2.Sf3#
- 1...Sf2
- 2.Qb4#
- 1...Se4
- 2.Sf3#
- 2.Sf5#
- 1...Sa6
- 2.Sf3#
- 2.f5#
- 1...Se6
- 2.Sf3#
- 2.Sf5#
- 2.Sxc6#
- 1...Sb7
- 2.Sf3#
- 2.f5#
- 1...Sd7
- 2.Sf3#
- 2.f5#
- 1...f5
- 2.Qb4#
- 1...bxa5!
- threat
- 1.Sxe3?
- threat
- 2.Sxd1#
- 2.Sc2#
- 2.Qb4#
- 1...Qxh7
- 2.Qb4#
- 1...Sxe3
- 2.Qb4#
- 1...Sxb3
- 2.f5#
- 1...axb3
- 2.Qb4#
- 1...bxa5
- 2.Sxd1#
- 1...Qg6
- 2.Qb4#
- 1...Rg6
- 2.Qb4#
- 1...f5
- 2.Qb4#
- 1...Qh1
- 2.Sc2#
- 2.Qb4#
- 1...Qh2
- 2.Sc2#
- 2.Sxc6#
- 2.Qb4#
- 1...Qh3
- 2.Sc2#
- 2.Sxc6#
- 2.Qb4#
- 1...Qh4
- 2.Sc2#
- 2.Sxc6#
- 2.Qb4#
- 1...Qe6
- 2.Sc2#
- 1...Re6
- 2.Sc2#
- 2.Qb4#
- 1...Sb2
- 2.Sd1#
- 2.Sxf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sc4#
- 2.S3d5#
- 1...Sc3
- 2.Sd1#
- 2.Sxf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sc4#
- 2.S3d5#
- 2.Qb4#
- 1...Se4
- 2.Sc2#
- 2.S3f5#
- 2.S7f5#
- 1...Sa6
- 2.Sxd1#
- 2.Sc2#
- 2.f5#
- 1...Se6
- 2.Sxd1#
- 2.Sc2#
- 2.Sxc6#
- 1...Sb7
- 2.Sxd1#
- 2.Sc2#
- 2.f5#
- 1...Sd7
- 2.Sxd1#
- 2.Sc2#
- 2.f5#
- 1...d2
- 2.Sxd1#
- 2.Sc2#
- 1...Sf2!
- threat
- 1.Se5?
- threat
- 2.Sf3#
- 2.Qb4#
- 1...Qxh7
- 2.Qb4#
- 1...Bxe5
- 2.Qb4#
- 1...Sxb3
- 2.f5#
- 1...axb3
- 2.Qb4#
- 1...Qg6
- 2.Qb4#
- 1...Rg6
- 2.Qb4#
- 1...f5
- 2.Qb4#
- 1...Qh1
- 2.Qb4#
- 1...Qh3
- 2.S5xc6#
- 2.Qb4#
- 1...Qe6
- 2.Sf3#
- 1...Be2
- 2.Qb4#
- 1...Bg2
- 2.Qb4#
- 1...Sb2
- 2.Sf3#
- 1...Sf2
- 2.Qb4#
- 1...Se4
- 2.Sf3#
- 2.Sf5#
- 1...Sa6
- 2.Sf3#
- 2.f5#
- 1...Se6
- 2.Sf3#
- 2.S5xc6#
- 2.S7xc6#
- 1...Sb7
- 2.Sf3#
- 2.f5#
- 1...Sd7
- 2.Sf3#
- 2.f5#
- 1...d2
- 2.Sf3#
- 1...bxa5!
- threat
- 1.Sd6?
- threat
- 2.Sb5#
- 2.Qb4#
- 1...Qxd6
- 2.Qb4#
- 1...Qxh7
- 2.Qb4#
- 1...Rxd6
- 2.Qb4#
- 1...Sxb3
- 2.f5#
- 1...axb3
- 2.Qb4#
- 1...bxa5
- 2.Sb5#
- 1...cxd6
- 2.Qb4#
- 1...Qe6
- 2.Sb5#
- 1...Qg6
- 2.Qb4#
- 1...Sb2
- 2.Sb5#
- 1...Sc3
- 2.Qb4#
- 1...Se4
- 2.Sdf5#
- 2.Sef5#
- 2.Sxc6#
- 1...Sa6
- 2.f5#
- 1...Se6
- 2.Sef5#
- 2.Sxc6#
- 1...Sb7
- 2.f5#
- 1...Sd7
- 2.f5#
- 1...b5
- 2.Sxb5#
- 2.Qb4#
- 1...f5
- 2.Qb4#
- 1...d2!
- threat
- 1.Qc3+?
- 1...Sxc3
- 2.Bxe3#
- 1...Kxc3!
- 1...Sxc3
- 1.Sd2?
- Keys
- 1.Sa3!
- threat
- 2.Sb5#
- 2.Qb4#
- 1...Qxh7
- 2.Qb4#
- 1...Sxb3
- 2.f5#
- 1...axb3
- 2.Qb4#
- 1...bxa5
- 2.Sb5#
- 1...Qg6
- 2.Qb4#
- 1...Rg6
- 2.Qb4#
- 1...f5
- 2.Qb4#
- 1...Qe6
- 2.Sb5#
- 1...Sb2
- 2.Sb5#
- 1...Sc3
- 2.Qb4#
- 1...Se4
- 2.Sf5#
- 1...Sa6
- 2.f5#
- 1...Se6
- 2.Sxc6#
- 1...Sb7
- 2.f5#
- 1...Sd7
- 2.f5#
- 1...d2
- 2.Sc2#
- 1...b5
- 2.Sxb5#
- 2.Qb4#
- threat
- 1.Sa3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 8
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::B(A),XR(d)
- S(g);N_GUARD,XP(B)::R(E)+P(D)
- S(g);N_PINS(H),SBLOCK::S(H)
- S(g);N_GUARD::R(E)+P(D)
- S(g);N_PINS(H)::S(H),XR(i)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(j);XB(I)::QAR2(F)
- S(g);N_GUARD,XP(B)::R(E)+P(D)
- P(e);XP(B)::QAR2(F)
- Q(j);::QAR2(F)
- Q(j);::S(C)
- R(i);::QAR2(F)
- B(b);::QAR2(F)
- S(a);::S(C)
- S(a);N_SPINR(d)::QAR2(F)
- P(l);::QAR2(F)
- Refutation
- P(h);XQ(F)
- Try
- S(C);N_SPINS(H),XR(d)
- Threat
- DUALS(3)
- Vars
- Q(j);XB(I)::QAR2(F)
- S(a);P_SPINS(a),XS(C)::QAR2(F)
- S(g);N_GUARD,XP(B)::R(E)+P(D)
- P(e);XP(B)::QAR2(F)
- P(h);XQ(F)::B(A)+S(C),XS(a)
- Q(j);::QAR2(F)
- R(i);::QAR2(F)
- P(l);::QAR2(F)
- Q(j);P_PINS(H)::B(A)+S(C),DCHECK
- Refutation
- S(a);
- Try
- S(C);N_SPINS(H)
- Threat
- DUALS(2)
- Vars
- Q(j);XB(I)::QAR2(F)
- B(m);XS(C)::QAR2(F)
- S(g);N_GUARD,XP(B)::R(E)+P(D)
- P(e);XP(B)::QAR2(F)
- Q(j);::QAR2(F)
- R(i);::QAR2(F)
- P(l);::QAR2(F)
- Q(j);P_PINS(H)::S(C)
- B(b);::QAR2(F)
- S(a);::S(C)
- S(a);N_SPINR(d)::QAR2(F)
- P(c);::S(C)
- Refutation
- P(h);XQ(F)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(j);XS(C)::QAR2(F)
- Q(j);XB(I)::QAR2(F)
- R(i);XS(C)::QAR2(F)
- S(g);N_GUARD,XP(B)::R(E)+P(D)
- P(e);XP(B)::QAR2(F)
- P(h);XQ(F)::S(C)
- P(k);XS(C)::QAR2(F)
- Q(j);::S(C)
- Q(j);::QAR2(F)
- S(a);::S(C)
- S(a);::QAR2(F)
- S(g);N_GUARD::R(E)+P(D)
- P(l);::QAR2(F)
- Refutation
- P(c);
- Try
- Q(F);CHECK
- Vars
- S(a);SBLOCK,XQ(F)::B(A),XR(d)
- Refutation
- K(f);N_SPINR(d),S_FLIGHT,XQ(F)
- Try
- Actual
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(j);XB(I)::QAR2(F)
- S(g);N_GUARD,XP(B)::R(E)+P(D)
- P(e);XP(B)::QAR2(F)
- P(h);XQ(F)::S(C)
- Q(j);::QAR2(F)
- R(i);::QAR2(F)
- P(l);::QAR2(F)
- Q(j);::S(C)
- S(a);::S(C)
- S(a);::QAR2(F)
- S(g);N_PINS(H),SBLOCK::S(H)
- S(g);N_GUARD::R(E)+P(D)
- S(g);N_PINS(H)::S(H),XR(i)
- P(c);N_GUARD::S(C)
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).