MESON Chess Problem Database
Problem Display
PID: 117695 (5NKb/1r3P1N/r7/2PBk3/3RP1p1/2R1QP1p/7q/B7 w - - 0 1)
Mochalkin, Oleksandr Viktorovich
1st Prize, Buletin Problemistic, 1986-1987
#2
12 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.f4#
- 1...Qh1
- 2.f4#
- 1...Qa2
- 2.f4#
- 1...Qb2
- 2.f4#
- 1...Qc2
- 2.f4#
- 1...Qd2
- 2.f4#
- 1...Qe2
- 2.f4#
- 1...Qg2
- 2.f4#
- 1...Rxa1
- 2.Sg6#
- 1...Ra2
- 2.Sg6#
- 1...Ra3
- 2.Sg6#
- 1...Ra4
- 2.Sg6#
- 1...Ra5
- 2.Sg6#
- 1...Rg6+
- 2.Sxg6#
- 1...Raa7
- 2.Sg6#
- 1...Rb1
- 2.Sd7#
- 1...Rb2
- 2.Sd7#
- 1...Rb3
- 2.Sd7#
- 1...Rb4
- 2.Sd7#
- 1...Rb5
- 2.Sd7#
- 1...Rb6
- 2.Sd7#
- 1...Rd7
- 2.Sxd7#
- 1...Bf6
- 2.Sg6#
- 1...g3
- 2.f4#
- 1...Qg1
- Tries
- 1.Ba2?
- threat
- 2.Rd5#
- 1...Rg6+
- 2.Sxg6#
- 1...Qxa2
- 2.f4#
- 1...Qd2
- 2.f4#
- 1...Rd7
- 2.Sxd7#
- 1...Rd6!
- threat
- 1.Bb3?
- threat
- 2.Rd5#
- 1...Rg6+
- 2.Sxg6#
- 1...Qd2
- 2.f4#
- 1...Rd7
- 2.Sxd7#
- 1...Rd6!
- threat
- 1.Bc4?
- threat
- 2.Rd5#
- 1...Rg6+
- 2.Sxg6#
- 1...Qd2
- 2.f4#
- 1...Rd7
- 2.Sxd7#
- 1...Rd6!
- threat
- 1.Bc6?
- threat
- 2.Rd5#
- 1...Qa2
- 2.f4#
- 1...Qd2
- 2.f4#
- 1...Rd7!
- threat
- 1.Rc2?
- threat
- 2.Qg5#
- 1...Rg6+
- 2.Sxg6#
- 1...Rxa1
- 2.Sg6#
- 1...Rxf7
- 2.Ra4#
- 1...Qd2
- 2.f4#
- 1...Rf6
- 2.Rb4#
- 1...Rb2
- 2.Sd7#
- 1...Bf6
- 2.Sg6#
- 1...Qf4!
- threat
- 1.Ra3?
- threat
- 2.Qg5#
- 1...Rg6+
- 2.Sxg6#
- 1...Rxf7
- 2.Rd2#
- 1...Qf4
- 2.Rb4#
- 1...Qb2
- 2.f4#
- 1...Qd2
- 2.f4#
- 1...Rb2
- 2.Sd7#
- 1...Bf6
- 2.Sg6#
- 1...Rf6!
- threat
- 1.Rb3?
- threat
- 2.Qg5#
- 1...Rg6+
- 2.Sxg6#
- 1...Rxa1
- 2.Sg6#
- 1...Qf4
- 2.Ra4#
- 1...Qb2
- 2.f4#
- 1...Qd2
- 2.f4#
- 1...Rf6
- 2.Rd2#
- 1...Bf6
- 2.Sg6#
- 1...Rxf7!
- threat
- 1.Ra4?
- threat
- 2.Qg5#
- 1...Rg6+
- 2.Sxg6#
- 1...Rxa4
- 2.Sg6#
- 1...Rxf7
- 2.Rc2#
- 1...Qf4
- 2.Rb3#
- 2.Qd4#
- 1...Qd2
- 2.f4#
- 1...Rb4
- 2.Sd7#
- 1...Bf6
- 2.Sg6#
- 1...Rf6!
- threat
- 1.Rb4?
- threat
- 2.Qg5#
- 1...Rg6+
- 2.Sxg6#
- 1...Rxb4
- 2.Sd7#
- 1...Qf4
- 2.Ra3#
- 2.Qd4#
- 1...Qd2
- 2.f4#
- 1...Rf6
- 2.Rc2#
- 1...Bf6
- 2.Sg6#
- 1...Rxf7!
- threat
- 1.Ba2?
- Keys
- 1.Rd2!
- threat
- 2.Qg5#
- 1...Rg6+
- 2.Sxg6#
- 1...Qxd2
- 2.f4#
- 1...Rxf7
- 2.Ra3#
- 1...Qf4
- 2.Qd4#
- 1...Rf6
- 2.Rb3#
- 1...Bf6
- 2.Sg6#
- threat
- 1.Rd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 21
- Sets
- Q(a);N_GUARD::P(D)
- R(e);N_GUARD,XB(A)::S(K)
- R(e);N_GUARD::S(K)
- R(e);CHECK,N_GUARD::S(K),XR(e)
- R(f);N_GUARD::S(K)
- R(f);N_GUARD::S(K),XR(f)
- B(g);S_CUTR(e)::S(K)
- P(c);S_CUTQ(a)::P(D)
- Tries
- Try
- B(H);
- Threat
- R1(E)
- Vars
- R(e);CHECK,N_GUARD::S(K),XR(e)
- Q(a);N_GUARD,P_PINP(I),XB(H)::P(D)
- Q(a);N_GUARD::P(D)
- R(f);N_GUARD::S(K),XR(f)
- Refutation
- R(e);
- Try
- B(H);
- Threat
- R1(E)
- Vars
- R(e);CHECK,N_GUARD::S(K),XR(e)
- Q(a);N_GUARD::P(D)
- R(f);N_GUARD::S(K),XR(f)
- Refutation
- R(e);
- Try
- B(H);
- Threat
- R1(E)
- Vars
- R(e);CHECK,N_GUARD::S(K),XR(e)
- Q(a);N_GUARD::P(D)
- R(f);N_GUARD::S(K),XR(f)
- Refutation
- R(e);
- Try
- B(H);
- Threat
- R1(E)
- Vars
- Q(a);N_GUARD,P_PINP(I)::P(D)
- Q(a);N_GUARD::P(D)
- Refutation
- R(f);
- Try
- R(B);
- Threat
- QAR2(C)
- Vars
- R(e);CHECK,N_GUARD::S(K),XR(e)
- R(e);N_GUARD,XB(A)::S(K)
- R(f);N_GUARD,XP(I)::B(A)+R(E)
- Q(a);N_GUARD::P(D)
- R(e);N_GUARD::B(A)+R(E)
- R(f);N_GUARD::S(K)
- B(g);S_CUTR(e)::S(K)
- Refutation
- Q(a);
- Try
- R(B);
- Threat
- QAR2(C)
- Vars
- R(e);CHECK,N_GUARD::S(K),XR(e)
- R(f);N_GUARD,XP(I)::B(A)+R(E)
- Q(a);N_GUARD::B(A)+R(E)
- Q(a);N_GUARD::P(D)
- R(f);N_GUARD::S(K)
- B(g);S_CUTR(e)::S(K)
- Refutation
- R(e);
- Try
- R(B);
- Threat
- QAR2(C)
- Vars
- R(e);CHECK,N_GUARD::S(K),XR(e)
- R(e);N_GUARD,XB(A)::S(K)
- Q(a);N_GUARD::B(A)+R(E)
- Q(a);N_GUARD::P(D)
- R(e);N_GUARD::B(A)+R(E)
- B(g);S_CUTR(e)::S(K)
- Refutation
- R(f);XP(I)
- Try
- R(E);
- Threat
- QAR2(C)
- Vars
- R(e);CHECK,N_GUARD::S(K),XR(e)
- R(e);N_GUARD,XR(E)::S(K)
- R(f);N_GUARD,XP(I)::B(A)+R(B)
- Q(a);N_GUARD::P(D)
- R(f);N_GUARD::S(K)
- B(g);S_CUTR(e)::S(K)
- Refutation
- R(e);
- Try
- R(E);
- Threat
- QAR2(C)
- Vars
- R(e);CHECK,N_GUARD::S(K),XR(e)
- R(f);N_GUARD,XR(E)::S(K)
- Q(a);N_GUARD::P(D)
- R(e);N_GUARD::B(A)+R(B)
- B(g);S_CUTR(e)::S(K)
- Refutation
- R(f);XP(I)
- Try
- Actual
- R(E);
- Threat
- QAR2(C)
- Vars
- R(e);CHECK,N_GUARD::S(K),XR(e)
- Q(a);N_GUARD,XR(E)::P(D)
- R(f);N_GUARD,XP(I)::B(A)+R(B)
- Q(a);SBLOCK::QAB1(C)
- R(e);N_GUARD::B(A)+R(B)
- B(g);S_CUTR(e)::S(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).