MESON Chess Problem Database
Problem Display
PID: 245469 (3Q2K1/b4p2/2pPN3/R2nk1P1/1N5R/5p1B/3Pq3/2r5 w - - 0 1)
Pilchenko, Viacheslav Karlovich
Shavirin, Valery Mikhailovich
64 Shakhmatnoe obozrenie, 1978
#2
10 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Sd3#
- 1...Qd3
- 2.Sxd3#
- 1...Qe1
- 2.Sd3#
- 1...Qf2
- 2.Sd3#
- 1...Qg2
- 2.Sd3#
- 1...Qh2
- 2.Sd3#
- 1...Ra1
- 2.Sxc6#
- 1...Rb1
- 2.Sxc6#
- 1...Rd1
- 2.Sxc6#
- 1...Re1
- 2.Sxc6#
- 1...Rf1
- 2.Sxc6#
- 1...Rg1
- 2.Sxc6#
- 1...Rh1
- 2.Sxc6#
- 1...Rc5
- 2.d4#
- 1...Bc5
- 2.Sxc6#
- 1...Bb8
- 2.d4#
- 1...c5
- 2.Sc6#
- 1...Qd1
- Tries
- 1.Sd4?
- threat
- 2.Qf6#
- 2.Qe7#
- 1...Qe4
- 2.Qf6#
- 1...Qb5
- 2.Sxf3#
- 1...Bc5
- 2.Sbxc6#
- 2.Sdxc6#
- 1...c5
- 2.Sbc6#
- 2.Sdc6#
- 1...f6
- 2.Qxf6#
- 2.Qe7#
- 1...Rc5!
- threat
- 1.Sc7?
- threat
- 2.Qf6#
- 2.Qe7#
- 1...Qe4
- 2.Qf6#
- 1...Rc5
- 2.d4#
- 1...Bc5
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 1...f6
- 2.Qxf6#
- 2.Qe7#
- 1...Qb5!
- threat
- 1.Sg7?
- threat
- 2.Qf6#
- 2.Qe7#
- 1...Qe4
- 2.Qf6#
- 1...Rc5
- 2.d4#
- 1...Bc5
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 1...f6
- 2.Qxf6#
- 2.Qe7#
- 1...Qb5!
- threat
- 1.Sf8?
- threat
- 2.Qf6#
- 2.Qe7#
- 1...Qe4
- 2.Qf6#
- 1...Rc5
- 2.d4#
- 1...Bc5
- 2.Sxc6#
- 1...c5
- 2.Sc6#
- 1...f6
- 2.Sg6#
- 2.Qxf6#
- 2.Qe7#
- 1...Qb5!
- threat
- 1.Rc5?
- threat
- 2.Sxc6#
- 2.d4#
- 1...Qxd2
- 2.Sxc6#
- 1...Rxc5
- 2.d4#
- 1...Bxc5
- 2.Sxc6#
- 1...Qb5
- 2.d4#
- 1...Qd1
- 2.Sd3#
- 2.Sxc6#
- 1...Qd3
- 2.Sxd3#
- 2.Sxc6#
- 1...Qc4
- 2.Sxc6#
- 1...Qa6
- 2.d4#
- 1...Qf2
- 2.Sd3#
- 2.Sxc6#
- 1...Qe3
- 2.Sxc6#
- 1...Qe4
- 2.Sxc6#
- 1...Rd1
- 2.Sxc6#
- 1...Rc4
- 2.Sxc6#
- 1...f5!
- threat
- 1.Sd4?
- Keys
- 1.Sc5!
- threat
- 2.Sxc6#
- 2.d4#
- 1...Sf6+
- 2.Qxf6#
- 1...Se7+
- 2.Qxe7#
- 1...Qxd2
- 2.Sxc6#
- 2.Re4#
- 1...Rxc5
- 2.d4#
- 1...Bxc5
- 2.Sxc6#
- 1...Sxb4
- 2.Sd3#
- 1...Qe4
- 2.Sxc6#
- 2.Rxe4#
- 1...Sf4
- 2.Qf6#
- 1...Qd1
- 2.Sbd3#
- 2.Sxc6#
- 2.Scd3#
- 2.Re4#
- 1...Qd3
- 2.Sbxd3#
- 2.Sxc6#
- 2.Scxd3#
- 1...Qc4
- 2.Sxc6#
- 1...Qb5
- 2.Re4#
- 2.d4#
- 1...Qa6
- 2.Re4#
- 2.d4#
- 1...Qf2
- 2.Sbd3#
- 2.Sxc6#
- 2.Scd3#
- 2.Re4#
- 1...Qe3
- 2.Sxc6#
- 1...Rd1
- 2.Sxc6#
- 1...Rc4
- 2.Sxc6#
- 1...Sc3
- 2.Scd3#
- 2.Qf6#
- 2.Qe7#
- 2.d4#
- 1...Se3
- 2.Scd3#
- 2.Re4#
- 2.Qf6#
- 2.Qe7#
- 2.d4#
- 1...Sb6
- 2.Scd3#
- 2.Qf6#
- 2.Qe7#
- 2.d4#
- 1...Sc7
- 2.Scd3#
- 2.Qf6#
- 2.d4#
- threat
- 1.Sc5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 14
- Sets
- Q(b);N_GUARD::S(C)
- Q(b);N_GUARD::S(C),XQ(b)
- Q(b);N_GUARD,P_PINP(F)::S(C)
- R(a);N_GUARD::S(C),XP(f)
- R(a);N_GUARD,P_PINP(F)::S(C),XP(f)
- R(a);N_SPINS(d),S_CUTB(g)::P(A)
- B(g);N_SPINS(d),S_CUTR(a)::S(C),XP(f)
- B(g);N_GUARD::P(A)
- P(f);N_SPINS(d),S_CUTR(a)::S(C)
- Tries
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- Q(b);::QAB1(I)
- Q(b);N_GUARD,N_SPINS(d)::S(H),XP(c)
- Refutation
- R(a);N_SPINS(d)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- Q(b);::QAB1(I)
- R(a);N_SPINS(d),S_CUTB(g)::P(A)
- B(g);N_SPINS(d),S_CUTR(a)::S(C),XP(f)
- P(f);N_SPINS(d),S_CUTR(a)::S(C)
- Refutation
- Q(b);N_SPINS(d)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- Q(b);::QAB1(I)
- R(a);N_SPINS(d),S_CUTB(g)::P(A)
- B(g);N_SPINS(d),S_CUTR(a)::S(C),XP(f)
- P(f);N_SPINS(d),S_CUTR(a)::S(C)
- Refutation
- Q(b);N_SPINS(d)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- Q(b);::QAB1(I)
- R(a);N_SPINS(d),S_CUTB(g)::P(A)
- B(g);N_SPINS(d),S_CUTR(a)::S(C),XP(f)
- P(f);N_SPINS(d),S_CUTR(a)::S(C)
- Refutation
- Q(b);N_SPINS(d)
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- Q(b);XP(A)::S(C),XP(f)
- R(a);N_SPINS(d),XR(E)::P(A)
- B(g);N_SPINS(d),XR(E)::S(C),XP(f)
- Q(b);::P(A)
- Q(b);::S(C),XP(f)
- R(a);::S(C),XP(f)
- Refutation
- P(h);
- Try
- Actual
- S(H);N_PINS(d)
- Threat
- DUALS(2)
- Vars
- S(d);CHECK,N_GUARD::QAB1(I),XS(d)
- S(d);CHECK,N_GUARD::QAR2(I),XS(d)
- R(a);XS(H)::P(A)
- B(g);XS(H)::S(C),XP(f)
- S(d);XS(C)::R(E)+S(H),DCHECK
- S(d);N_GUARD::QAB1(I)
- Q(b);::S(C),XP(f)
- R(a);::S(C),XP(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).