MESON Chess Problem Database
Problem Display
PID: 245422 (Q1b2KN1/2p1R3/2np1Rp1/n2k1B2/3P4/b1P5/3N1B2/1q6 w - - 0 1)
Pankratiev, Aleksandr Nikolaevich
Shakhmaty v SSSR, 1990
#2
10 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Be4#
- 1...Qe4
- 2.Bxe4#
- 1...Qa1
- 2.Be4#
- 1...Qc1
- 2.Be4#
- 1...Qd1
- 2.Be4#
- 1...Qf1
- 2.Be4#
- 1...Qg1
- 2.Be4#
- 1...Qb2
- 2.Be4#
- 1...Qb3
- 2.Be4#
- 1...Qb4
- 2.Be4#
- 1...Qb5
- 2.Be4#
- 1...Qb6
- 2.Be4#
- 1...Qb7
- 2.Be4#
- 1...Qb8
- 2.Be4#
- 1...Ba6
- 2.Be6#
- 1...Be6
- 2.Bxe6#
- 1...Bb7
- 2.Be6#
- 1...Sb3
- 2.c4#
- 1...Sb7
- 2.c4#
- 1...Qa2
- Tries
- 1.Rxd6+?
- 1...Bxd6
- 2.Sf6#
- 1...cxd6
- 2.Sf6#
- 1...Kxd6!
- 1...Bxd6
- 1.Re1?
- threat
- 2.Se7#
- 1...Qe4
- 2.Bxe4#
- 1...Qb7
- 2.Be4#
- 1...Bb7
- 2.Be6#
- 1...Sb7
- 2.c4#
- 1...Qxe1!
- threat
- 1.Re3?
- threat
- 2.Se7#
- 1...Qe4
- 2.Bxe4#
- 1...Qb7
- 2.Be4#
- 1...Bb7
- 2.Be6#
- 1...Sb7!
- threat
- 1.Re4?
- threat
- 2.Se7#
- 1...Qxe4
- 2.Bxe4#
- 1...Bb7
- 2.Be6#
- 1...Sb7
- 2.c4#
- 1...Qb7!
- threat
- 1.Ree6?
- threat
- 2.Se7#
- 1...Qb7
- 2.Be4#
- 1...Sb7
- 2.c4#
- 1...Bb7!
- threat
- 1.Rxc7?
- threat
- 2.Se7#
- 1...Qe4
- 2.Bxe4#
- 1...Qb7
- 2.Be4#
- 1...Bb7
- 2.Be6#
- 1...Sb7
- 2.c4#
- 1...Qe1!
- threat
- 1.Rd7?
- threat
- 2.Se7#
- 2.Be6#
- 1...Qxf5
- 2.Se7#
- 1...Bxd7
- 2.Se7#
- 1...gxf5
- 2.Se7#
- 1...Qe4
- 2.Bxe4#
- 1...Qb7
- 2.Be4#
- 2.Be6#
- 1...Bb7
- 2.Be6#
- 1...Sb7
- 2.Be6#
- 2.c4#
- 1...Qe1!
- threat
- 1.Ref7?
- threat
- 2.Se7#
- 1...Qe4
- 2.Bxe4#
- 1...Qb7
- 2.Be4#
- 1...Bb7
- 2.Be6#
- 1...Sb7
- 2.c4#
- 1...Qe1!
- threat
- 1.Rg7?
- threat
- 2.Se7#
- 1...Qe4
- 2.Bxe4#
- 1...Qb7
- 2.Be4#
- 1...Bb7
- 2.Be6#
- 1...Sb7
- 2.c4#
- 1...Qe1!
- threat
- 1.Rh7?
- threat
- 2.Se7#
- 1...Qe4
- 2.Bxe4#
- 1...Qb7
- 2.Be4#
- 1...Bb7
- 2.Be6#
- 1...Sb7
- 2.c4#
- 1...Qe1!
- threat
- 1.Re8?
- threat
- 2.Se7#
- 1...Qe4
- 2.Bxe4#
- 1...Qb7
- 2.Be4#
- 1...Bb7
- 2.Be6#
- 1...Sb7
- 2.c4#
- 1...Qe1!
- threat
- 1.Qxc6+?
- 1...Sxc6
- 2.c4#
- 1...Kxc6!
- 1...Sxc6
- 1.Qxa5+?
- 1...Qb5
- 2.Be4#
- 2.c4#
- 1...Bc5
- 2.c4#
- 1...Sxa5!
- 1...Qb5
- 1.Rxd6+?
- Keys
- 1.Re2!
- threat
- 2.Se7#
- 1...Qe4
- 2.Bxe4#
- 1...Qb7
- 2.Be4#
- 1...Bb7
- 2.Be6#
- 1...Sb7
- 2.c4#
- threat
- 1.Re2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 15
- Sets
- Q(a);N_GUARD::B(E)
- Q(a);N_GUARD::B(E),XQ(a)
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- B(i);N_GUARD::B(E)
- B(i);N_GUARD::B(E),XB(i)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD::P(C)
- S(c);N_GUARD,N_SPINS(e)::P(C)
- Tries
- Try
- R(F);CHECK,XP(f)
- Vars
- B(b);P_PINR(G),SBLOCK,XR(F)::S(J)
- P(h);SBLOCK,XR(F)::S(J)
- Refutation
- K(d);N_SPINS(e),P-FLIGHT,XR(F)
- Try
- R(G);
- Threat
- S(J)
- Vars
- Q(a);N_GUARD::B(E),XQ(a)
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD,N_SPINS(e)::P(C)
- Refutation
- Q(a);XR(G)
- Try
- R(G);
- Threat
- S(J)
- Vars
- Q(a);N_GUARD::B(E),XQ(a)
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- Refutation
- S(c);N_SPINS(e)
- Try
- R(G);
- Threat
- S(J)
- Vars
- Q(a);OGATE,XR(G)::B(E),XQ(a)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD,N_SPINS(e)::P(C)
- Refutation
- Q(a);N_SPINS(e)
- Try
- R(G);
- Threat
- S(J)
- Vars
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD,N_SPINS(e)::P(C)
- Refutation
- B(i);N_SPINS(e)
- Try
- R(G);XP(h)
- Threat
- S(J)
- Vars
- Q(a);N_GUARD::B(E),XQ(a)
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD,N_SPINS(e)::P(C)
- Refutation
- Q(a);
- Try
- R(G);P_PINP(f)
- Threat
- DUALS(2)
- Vars
- Q(a);P_PINR(F),XB(E)::S(J)
- B(i);N_SPINP(f),XR(G)::S(J)
- P(g);XB(E)::S(J)
- Q(a);N_GUARD::B(E),XQ(a)
- B(i);N_SPINS(e)::B(E)
- Refutation
- Q(a);
- Try
- R(G);
- Threat
- S(J)
- Vars
- Q(a);N_GUARD::B(E),XQ(a)
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD,N_SPINS(e)::P(C)
- Refutation
- Q(a);
- Try
- R(G);
- Threat
- S(J)
- Vars
- Q(a);N_GUARD::B(E),XQ(a)
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD,N_SPINS(e)::P(C)
- Refutation
- Q(a);
- Try
- R(G);
- Threat
- S(J)
- Vars
- Q(a);N_GUARD::B(E),XQ(a)
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD,N_SPINS(e)::P(C)
- Refutation
- Q(a);
- Try
- R(G);
- Threat
- S(J)
- Vars
- Q(a);N_GUARD::B(E),XQ(a)
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD,N_SPINS(e)::P(C)
- Refutation
- Q(a);
- Try
- Q(H);CHECK,XS(e)
- Vars
- S(c);SBLOCK,XQ(H)::P(C)
- Refutation
- K(d);P_SPINP(f),S_FLIGHT,XQ(H)
- Try
- Q(H);CHECK,N_PINS(e),XS(c)
- Vars
- B(b);P_SPINB(b)::P(C)
- Refutation
- S(e);XQ(H)
- Try
- Actual
- R(G);
- Threat
- S(J)
- Vars
- Q(a);N_GUARD::B(E),XQ(a)
- Q(a);N_GUARD,N_SPINS(e)::B(E)
- B(i);N_GUARD,N_SPINS(e)::B(E)
- S(c);N_GUARD,N_SPINS(e)::P(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).