MESON Chess Problem Database
Problem Display
PID: 85286 (4b3/K7/QN3n2/1B3RN1/n2k1Bp1/5R2/2Pr4/q7 w - - 0 1)
Ivunin, Alexey Vsevolodovich
Na Smenu!, 1972
#2
9 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Qxa4#
- 1...Qd1
- 2.Qxa4#
- 1...Qe1
- 2.Qxa4#
- 1...Qg1
- 2.Qxa4#
- 1...Qh1
- 2.Qxa4#
- 1...Rxc2
- 2.Rd3#
- 1...Re2
- 2.Rd3#
- 1...Rf2
- 2.Rd3#
- 1...Rg2
- 2.Rd3#
- 1...Rh2
- 2.Rd3#
- 1...Rd3
- 2.Rxd3#
- 1...Sb2
- 2.c3#
- 1...Sc3
- 2.Be3#
- 1...Sc5
- 2.Be5#
- 2.Qxa1#
- 1...Sxb6
- 2.Qxa1#
- 1...Se4
- 2.Se6#
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sh5
- 2.Rd5#
- 1...Sd7
- 2.Rd5#
- 1...Sh7
- 2.Rd5#
- 1...Sg8
- 2.Rd5#
- 1...Qc1
- Tries
- 1.Sxa4?
- threat
- 2.Be3#
- 2.Qb6#
- 2.Qxf6#
- 1...Qxa4
- 2.Qxa4#
- 2.c3#
- 1...Rxc2
- 2.Be3#
- 2.Rd3#
- 2.Qxf6#
- 1...gxf3
- 2.Qb6#
- 2.Qxf6#
- 1...Qc3
- 2.Qxf6#
- 1...Qe1
- 2.Qb6#
- 2.c3#
- 1...Qg1
- 2.Qb6#
- 2.Qxf6#
- 2.c3#
- 1...Qa3
- 2.Qxf6#
- 1...Re2
- 2.Rd3#
- 2.Qb6#
- 1...Rd3
- 2.Rxd3#
- 2.Qb6#
- 2.Qxf6#
- 1...Bc6
- 2.Be3#
- 2.Qb6#
- 1...Se4
- 2.Se6#
- 2.Be3#
- 1...Sd5
- 2.Be5#
- 1...Sh5
- 2.Be3#
- 2.Qb6#
- 2.Qd6#
- 1...Sd7
- 2.Be3#
- 2.Qd6#
- 1...Sh7
- 2.Be3#
- 2.Qb6#
- 2.Qd6#
- 1...Sg8
- 2.Be3#
- 2.Qb6#
- 2.Qd6#
- 1...Bxb5!
- threat
- 1.Rb3?
- threat
- 2.Be3#
- 1...Sd5
- 2.Rxd5#
- 1...Qe1
- 2.Qxa4#
- 1...Qg1
- 2.Qxa4#
- 1...Re2
- 2.Rd3#
- 1...Rd3
- 2.Rxd3#
- 1...Sc3
- 2.Rb4#
- 1...Qc3!
- threat
- 1.c3+?
- 1...Sxc3
- 2.Be3#
- 1...Qxc3!
- 1...Sxc3
- 1.Sxa4?
- Keys
- 1.Sd7!
- threat
- 2.Qxf6#
- 1...Sxd7
- 2.Qd6#
- 1...Qe1
- 2.Qxa4#
- 1...Re2
- 2.Rd3#
- 1...Sb2
- 2.c3#
- 1...Sc3
- 2.Be3#
- 1...Sc5
- 2.Qxa1#
- 1...Sb6
- 2.Qxa1#
- 1...Se4
- 2.Se6#
- 1...Sd5
- 2.Be5#
- 1...Sh5
- 2.Qd6#
- 1...Sh7
- 2.Qd6#
- 1...Sg8
- 2.Qd6#
- threat
- 1.Sd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- Q(a);N_GUARD::QAR(G),XS(c)
- R(b);N_GUARD,XP(A)::R1(B)
- R(b);N_GUARD::R1(B)
- R(b);N_GUARD::R1(B),XR(b)
- S(c);N_GUARD,P_PINQ(G),S_CUTQ(a)::P(A)
- S(c);P_PINQ(G),SBLOCK::B(C)
- S(c);OGATE,P_PINQ(G),XS(H)::QAB(G),XQ(a)
- S(f);N_GUARD::R1(E),XS(f)
- S(f);N_GUARD::R1(E)
- Tries
- Try
- S(H);XS(c)
- Threat
- DUALS(3)
- Vars
- Q(a);::QAB(G),XS(f)
- S(f);SBLOCK::B(C)
- Refutation
- B(g);XB(D)
- Try
- R(B);
- Threat
- B(C)
- Vars
- S(f);N_GUARD::R1(E),XS(f)
- Q(a);N_GUARD::QAR(G),XS(c)
- R(b);N_GUARD::R1(B)
- R(b);N_GUARD::R1(B),XR(b)
- S(c);P_PINQ(G),SBLOCK::R(B)
- Refutation
- Q(a);
- Try
- P(A);CHECK
- Vars
- S(c);P_PINQ(G),SBLOCK,XP(A)::B(C)
- Refutation
- Q(a);XP(A)
- Try
- Actual
- S(H);
- Threat
- QAB(G),XS(f)
- Vars
- S(f);N_GUARD,XS(H)::QAR2(G)
- Q(a);N_GUARD::QAR(G),XS(c)
- R(b);N_GUARD::R1(B)
- S(c);N_GUARD,P_PINQ(G),S_CUTQ(a)::P(A)
- S(c);P_PINQ(G),SBLOCK::B(C)
- S(c);OGATE,P_PINQ(G)::QAB(G),XQ(a)
- S(f);SBLOCK::S(F)
- S(f);SBLOCK::B(C)
- S(f);N_GUARD::QAR2(G)
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).