MESON Chess Problem Database
Problem Display
PID: 188629 (3K2B1/2pNQ3/5P2/4bR2/2r1k1P1/3pPn2/3p1Ppq/1N6 w - - 0 1)
Yacoubian, Garen
Schweizerische Schachzeitung, 1969
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Rf4#
- 1...Qf4
- 2.Rxf4#
- 1...Qh1
- 2.Rf4#
- 1...Qh3
- 2.Rf4#
- 1...Qh4
- 2.Rf4#
- 1...Qh5
- 2.Rf4#
- 1...Qh7
- 2.Rf4#
- 1...Qh8
- 2.Rf4#
- 1...Rc3
- 2.Sxc3#
- 1...Ra4
- 2.Sc3#
- 2.Sc5#
- 1...Rb4
- 2.Sc3#
- 2.Sc5#
- 1...Rd4
- 2.Sc3#
- 1...Rc5
- 2.Sxc5#
- 1...Se1
- 2.Sxd2#
- 1...Sg1
- 2.Sxd2#
- 1...Sd4
- 2.Sxd2#
- 1...Sh4
- 2.Sxd2#
- 1...Sg5
- 2.Sxd2#
- 1...Qg1
- Tries
- 1.Bxc4?
- threat
- 2.Sc3#
- 2.Sc5#
- 1...d1S
- 2.Sc5#
- 1...c5
- 2.Sc3#
- 2.Sxc5#
- 1...Qh8+!
- threat
- 1.Rxe5+?
- 1...Sxe5
- 2.Sxd2#
- 1...Qxe5!
- 1...Sxe5
- 1.Qc5?
- threat
- 2.Bd5#
- 2.Qd5#
- 1...Bxf6+
- 2.Sxf6#
- 1...Rxc5
- 2.Sxc5#
- 1...Qh8
- 2.Qd5#
- 1...Rd4
- 2.Sc3#
- 1...c6!
- threat
- 1.Qxe5+?
- 1...Sxe5
- 2.Sxd2#
- 1...Qxe5!
- 1...Sxe5
- 1.Qe6?
- threat
- 2.Qd5#
- 1...Rd4
- 2.Sc3#
- 1...Rc5
- 2.Sxc5#
- 1...c6!
- threat
- 1.Qf7?
- threat
- 2.Qd5#
- 1...Bxf6+
- 2.Sxf6#
- 1...Rd4
- 2.Sc3#
- 1...Rc5
- 2.Sxc5#
- 1...c6!
- threat
- 1.Qh7?
- threat
- 2.Rf4#
- 2.Rxe5#
- 2.Rh5#
- 1...Bxf6+
- 2.Sxf6#
- 1...Qf4
- 2.Rxf4#
- 2.Rxe5#
- 1...Qh5
- 2.Rf4#
- 2.Rxe5#
- 2.Rxh5#
- 1...Qh6
- 2.Rf4#
- 2.Rxe5#
- 1...Ba1
- 2.Bd5#
- 2.Rf4#
- 2.Re5#
- 2.Rh5#
- 1...Bb2
- 2.Bd5#
- 2.Rf4#
- 2.Re5#
- 2.Rh5#
- 1...Bc3
- 2.Bd5#
- 2.Rf4#
- 2.Re5#
- 2.Rh5#
- 1...Bg3
- 2.Bd5#
- 2.Rf4#
- 2.Re5#
- 2.Rh5#
- 1...Bd4
- 2.Bd5#
- 2.Rf4#
- 2.Re5#
- 2.Rh5#
- 1...Bf4
- 2.Bd5#
- 2.Rxf4#
- 2.Re5#
- 2.Rh5#
- 1...Bd6
- 2.Bd5#
- 2.Rf4#
- 2.Re5#
- 2.Rh5#
- 1...Se1
- 2.Sxd2#
- 2.Rf4#
- 1...Sg1
- 2.Sxd2#
- 2.Rf4#
- 1...Sd4
- 2.Sxd2#
- 2.Rf4#
- 1...Sh4
- 2.Sxd2#
- 2.Rf4#
- 1...Sg5
- 2.Sxd2#
- 2.Rf4#
- 1...Qxh7!
- threat
- 1.Bxc4?
- Keys
- 1.Qb4!
- threat
- 2.Sc5#
- 1...Bxf6+
- 2.Sxf6#
- 1...Rd4
- 2.Sc3#
- 1...Bd4
- 2.Bd5#
- 1...Bd6
- 2.Sc3#
- 2.Bd5#
- 1...Sd4
- 2.Sxd2#
- 1...c5
- 2.Sxc5#
- 2.Qb7#
- threat
- 1.Qb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 14
- Sets
- Q(c);N_GUARD::R1(E)
- Q(c);N_GUARD::R1(E),XQ(c)
- Q(c);N_GUARD,P_PINB(J)::R1(E)
- R(f);N_GUARD::S(A),XR(f)
- R(f);N_GUARD,P_PINS(G)::S(A)
- R(f);N_GUARD::S(G),XR(f)
- S(e);N_GUARD::S(A),XP(a)
- Tries
- Try
- B(J);XR(f)
- Threat
- DUALS(2)
- Vars
- P(a);::S(G)
- Refutation
- Q(c);CHECK
- Try
- R(E);CHECK,XB(h)
- Vars
- S(e);P_SPINS(e),XR(E)::S(A),XP(a)
- Refutation
- Q(c);P_SPINQ(c),XR(E)
- Try
- Q(H);N_PINB(h)
- Threat
- DUALS(2)
- Vars
- B(h);CHECK,XP(F)::S(G),XB(h)
- R(f);XQ(H)::S(G),XR(f)
- Q(c);P_PINB(J)::QAB1(H)
- R(f);N_GUARD,P_PINS(G),S_CUTB(h)::S(A)
- Refutation
- P(i);
- Try
- Q(H);CHECK,XB(h)
- Vars
- S(e);XQ(H)::S(A),XP(a)
- Refutation
- Q(c);XQ(H)
- Try
- Q(H);
- Threat
- QAB1(H)
- Vars
- R(f);N_GUARD,P_PINS(G)::S(A)
- R(f);N_GUARD::S(G),XR(f)
- Refutation
- P(i);
- Try
- Q(H);N_PINB(h)
- Threat
- QAB1(H)
- Vars
- B(h);CHECK,XP(F)::S(G),XB(h)
- R(f);N_GUARD,P_PINS(G),S_CUTB(h)::S(A)
- R(f);N_GUARD::S(G),XR(f)
- Refutation
- P(i);
- Try
- Q(H);N_PINB(h)
- Threat
- DUALS(3)
- Vars
- B(h);CHECK,XP(F)::S(G),XB(h)
- Refutation
- Q(c);XQ(H)
- Try
- Actual
- Q(H);N_PINB(h),P_PINR(f)
- Threat
- S(G)
- Vars
- B(h);CHECK,XP(F)::S(G),XB(h)
- R(f);P_PINS(G),S_CUTB(h)::S(A)
- B(h);N_SPINR(f)::B(J)
- S(e);N_GUARD,N_SPINR(f)::S(A),XP(a)
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).