MESON Chess Problem Database
Problem Display
PID: 41814 (8/4N2r/8/6Rp/7k/4B3/1p1r2RK/1qbbN3 w - - 0 1)
Gavrilov, Constantin Grigorievich
De Problemist, 1930
#2
6 + 8
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Sf5#
- 2.Sg6#
- 1...Qf5
- 2.Sxf5#
- 1...Qg6
- 2.Sxg6#
- 1...Qa1
- 2.Sf5#
- 2.Sg6#
- 1...Rc2
- 2.Sf5#
- 2.Sg6#
- 1...Re2
- 2.Sf3#
- 1...Rf2
- 2.Bxf2#
- 1...Rxg2+
- 2.Sxg2#
- 1...Rd3
- 2.Sf5#
- 2.Sg6#
- 1...Rd4
- 2.Bf2#
- 1...Rd5
- 2.Bf2#
- 1...Rd6
- 2.Bf2#
- 1...Rd7
- 2.Bf2#
- 1...Rd8
- 2.Bf2#
- 1...Bc2
- 2.Sf3#
- 1...Be2
- 2.Bf2#
- 1...Bb3
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Ba4
- 2.Sf3#
- 1...Qa2
- Tries
- 1.Rxd2?
- threat
- 2.Sg2#
- 1...Bf3
- 2.Sxf3#
- 1...Qe4!
- threat
- 1.Rg3?
- threat
- 2.Bg5#
- 2.Rh3#
- 1...Rxg2+
- 2.Sxg2#
- 1...Qf5
- 2.Sxf5#
- 1...Qg6
- 2.Sxg6#
- 2.Rh3#
- 1...Rc2
- 2.Sf5#
- 2.Sg6#
- 2.Rh3#
- 1...Re2
- 2.Sf3#
- 2.Rh3#
- 1...Rf2
- 2.Rh3#
- 1...Rd3
- 2.Sf5#
- 2.Sg6#
- 2.Rh3#
- 1...Rd4
- 2.Rh3#
- 1...Rd5
- 2.Rh3#
- 1...Rd6
- 2.Rh3#
- 1...Rd7
- 2.Rh3#
- 1...Rd8
- 2.Rh3#
- 1...Rg7
- 2.Rh3#
- 1...Bg4!
- threat
- 1.Rg7?
- threat
- 2.Bg5#
- 1...Rxg2+
- 2.Sxg2#
- 1...Qf5
- 2.Sxf5#
- 1...Qg6
- 2.Sxg6#
- 1...Rc2
- 2.Sf5#
- 2.Sg6#
- 1...Re2
- 2.Sf3#
- 1...Rf2
- 2.Bxf2#
- 1...Rd3
- 2.Sf5#
- 2.Sg6#
- 1...Rd4
- 2.Bf2#
- 1...Rd5
- 2.Bf2#
- 1...Rd6
- 2.Bf2#
- 1...Rd7
- 2.Bf2#
- 1...Rd8
- 2.Bf2#
- 1...Rxg7!
- threat
- 1.Rg8?
- threat
- 2.Bg5#
- 1...Rxg2+
- 2.Sxg2#
- 1...Qf5
- 2.Sxf5#
- 1...Qg6
- 2.Sxg6#
- 1...Rc2
- 2.Sf5#
- 2.Sg6#
- 1...Re2
- 2.Sf3#
- 1...Rf2
- 2.Bxf2#
- 1...Rd3
- 2.Sf5#
- 2.Sg6#
- 1...Rd4
- 2.Bf2#
- 1...Rd5
- 2.Bf2#
- 1...Rd6
- 2.Bf2#
- 1...Rd7
- 2.Bf2#
- 1...Rd8
- 2.Bf2#
- 1...Rg7!
- threat
- 1.Rxd2?
- Keys
- 1.Rg6!
- threat
- 2.Bg5#
- 1...Rxg2+
- 2.Sxg2#
- 1...Qxg6
- 2.Sxg6#
- 1...Qf5
- 2.Sxf5#
- 1...Rc2
- 2.Sf5#
- 1...Re2
- 2.Sf3#
- 1...Rf2
- 2.Bxf2#
- 1...Rd3
- 2.Sf5#
- 1...Rd4
- 2.Bf2#
- 1...Rd5
- 2.Bf2#
- 1...Rd6
- 2.Bf2#
- 1...Rd7
- 2.Bf2#
- 1...Rd8
- 2.Bf2#
- threat
- 1.Rg6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- Q(a);N_GUARD::S(F),XQ(a)
- R(e);S_CUTB(c)::S(A)
- R(e);N_GUARD::B(D),XR(e)
- R(e);CHECK,XR(B)::S(A),XR(e)
- R(e);N_GUARD,N_PINR(B)::B(D)
- B(c);N_GUARD::S(A)
- B(c);N_PINR(B),S_CUTR(e)::B(D)
- B(c);N_GUARD::S(A),XB(c)
- B(c);N_GUARD,SBLOCK::S(A)
- Tries
- Try
- R(B);N_SPINR(B),XR(e)
- Threat
- S(A)
- Vars
- B(c);N_GUARD::S(A),XB(c)
- Refutation
- Q(a);
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,XR(B)::S(A),XR(e)
- Q(a);N_GUARD::S(F),XQ(a)
- R(e);::R1(E)
- R(e);N_PINR(B)::R1(E)
- R(h);::R1(E)
- Refutation
- B(c);
- Try
- R(E);
- Threat
- B(D)
- Vars
- R(e);CHECK,XR(B)::S(A),XR(e)
- Q(a);N_GUARD::S(F),XQ(a)
- R(e);S_CUTB(c)::S(A)
- R(e);N_GUARD::B(D),XR(e)
- R(e);N_GUARD,N_PINR(B)::B(D)
- Refutation
- R(h);XR(E)
- Try
- R(E);
- Threat
- B(D)
- Vars
- R(e);CHECK,XR(B)::S(A),XR(e)
- Q(a);N_GUARD::S(F),XQ(a)
- R(e);S_CUTB(c)::S(A)
- R(e);N_GUARD::B(D),XR(e)
- R(e);N_GUARD,N_PINR(B)::B(D)
- Refutation
- R(h);
- Try
- Actual
- R(E);
- Threat
- B(D)
- Vars
- R(e);CHECK,XR(B)::S(A),XR(e)
- Q(a);XR(E)::S(F),XQ(a)
- Q(a);N_GUARD::S(F),XQ(a)
- R(e);S_CUTQ(a)::S(F)
- R(e);S_CUTB(c)::S(A)
- R(e);N_GUARD::B(D),XR(e)
- R(e);N_PINR(B),S_CUTQ(a)::S(F)
- R(e);N_GUARD,N_PINR(B)::B(D)
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).