MESON Chess Problem Database
Problem Display
PID: 7917 (2K5/B1NP4/5P2/Q2p2R1/2r2k1P/4R1N1/1p6/3q3B w - - 0 1)
Hirschenson, Aaron
The Problemist, 1994
#2
11 + 5
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Sh5#
- 2.Rf3#
- 1...Qe2
- 2.Sxe2#
- 1...Qb3
- 2.Se2#
- 2.Sh5#
- 1...Qf3
- 2.Rxf3#
- 1...Qa4
- 2.Se2#
- 2.Sh5#
- 2.Rf3#
- 1...Qh5
- 2.Sxh5#
- 1...Qa1
- 2.Se2#
- 2.Sh5#
- 2.Rf3#
- 1...Qb1
- 2.Se2#
- 2.Sh5#
- 2.Rf3#
- 1...Qc1
- 2.Se2#
- 2.Sh5#
- 2.Rf3#
- 1...Qe1
- 2.Sh5#
- 2.Rf3#
- 1...Qf1
- 2.Sh5#
- 1...Qg1
- 2.Se2#
- 2.Sh5#
- 2.Rf3#
- 1...Qxh1
- 2.Se2#
- 2.Sh5#
- 1...Qd2
- 2.Sh5#
- 2.Rf3#
- 1...Qd3
- 2.Sh5#
- 1...Qd4
- 2.Rf3#
- 1...Ra4
- 2.Se6#
- 1...Rb4
- 2.Se6#
- 1...Rxc7+
- 2.Qxc7#
- 1...d4
- 2.Re4#
- 2.Qe5#
- 1...Qc2
- Tries
- 1.Re2?
- threat
- 2.Sh5#
- 2.Be3#
- 1...Rxc7+
- 2.Qxc7#
- 1...Qxe2
- 2.Sxe2#
- 1...Qb3
- 2.Sh5#
- 1...Qc1
- 2.Sh5#
- 2.Rf2#
- 1...Qg1
- 2.Sh5#
- 1...Qd2
- 2.Sh5#
- 2.Qxd2#
- 1...Qd3
- 2.Sh5#
- 1...Qd4
- 2.Sh5#
- 1...Rc3
- 2.Sh5#
- 1...Rd4
- 2.Sh5#
- 2.Se6#
- 1...Re4
- 2.Sh5#
- 1...Rc5
- 2.Sh5#
- 1...d4
- 2.Sh5#
- 2.Re4#
- 2.Qe5#
- 2.Qf5#
- 1...Qxh1!
- threat
- 1.Rd3?
- threat
- 2.Be3#
- 1...Rxc7+
- 2.Qxc7#
- 1...Qxh1
- 2.Qd2#
- 1...Qxd3
- 2.Sh5#
- 1...Qe2
- 2.Sxe2#
- 1...Qf3
- 2.Rxf3#
- 1...Qg4
- 2.Qd2#
- 1...Qc1
- 2.Se2#
- 2.Sh5#
- 2.Rf3#
- 1...Qe1
- 2.Sh5#
- 2.Rf3#
- 1...Qg1
- 2.Se2#
- 2.Sh5#
- 2.Rf3#
- 1...Qd2
- 2.Sh5#
- 2.Rf3#
- 2.Qxd2#
- 1...Rd4
- 2.Se6#
- 1...Re4
- 2.Sxd5#
- 1...d4
- 2.Qe5#
- 2.Qf5#
- 1...Rc5!
- threat
- 1.Re4+?
- 1...dxe4
- 2.Qe5#
- 2.Qf5#
- 1...Rxe4!
- 1...dxe4
- 1.Qd2?
- threat
- 2.Rf3#
- 2.Re4#
- 1...Qxh1
- 2.Se2#
- 2.Sh5#
- 2.Ra3#
- 2.Rb3#
- 2.Rc3#
- 2.Rd3#
- 1...Qxd2
- 2.Sh5#
- 2.Rf3#
- 1...Qf3
- 2.Rxf3#
- 2.Re4#
- 1...Qg4
- 2.Ra3#
- 2.Rb3#
- 2.Rc3#
- 2.Rd3#
- 2.Rf3#
- 1...Re4
- 2.Sxd5#
- 2.Rf3#
- 2.Rxe4#
- 1...Rxc7+!
- threat
- 1.Qxd5?
- threat
- 2.Qe5#
- 2.Qf5#
- 1...Qxd5
- 2.Se2#
- 2.Sh5#
- 1...Qd4
- 2.Rf3#
- 2.Qf3#
- 1...Rd4
- 2.Qe5#
- 1...Rc5
- 2.Re4#
- 2.Qe4#
- 1...b1Q
- 2.Qe5#
- 1...b1B
- 2.Qe5#
- 1...Qc2
- 2.Sh5#
- 2.Rf3#
- 2.Qf3#
- 2.Qe5#
- 2.Qd6#
- 1...Qg4
- 2.Qxc4#
- 2.Qe5#
- 2.Qd6#
- 1...Qb1
- 2.Se2#
- 2.Sh5#
- 2.Rf3#
- 2.Qf3#
- 2.Qe5#
- 2.Qd6#
- 1...Qd3
- 2.Sh5#
- 2.Qf3#
- 2.Qe5#
- 1...Re4
- 2.Rxe4#
- 2.Qxe4#
- 2.Qf5#
- 1...Rxc7+!
- threat
- 1.Re2?
- Keys
- 1.Qb4!
- threat
- 2.Qd6#
- 1...Rxb4
- 2.Se6#
- 1...Qd4
- 2.Rf3#
- 1...Rd4
- 2.Sxd5#
- 1...d4
- 2.Re4#
- 1...Re4
- 2.Se6#
- threat
- 1.Qb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- Q(a);N_GUARD::S(C),XQ(a)
- Q(a);N_GUARD::R1(B),XQ(a)
- Q(a);N_GUARD::S(C)
- Q(a);N_GUARD::R1(B)
- R(c);N_PINS(I)::S(I)
- R(c);CHECK,OGATE,XS(I)::QAB(E),XR(c)
- Tries
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- R(c);CHECK,OGATE,XS(I)::QAB(E),XR(c)
- Q(a);XR(B)::S(C),XQ(a)
- Q(a);::S(C)
- R(c);::S(C)
- R(c);N_PINS(I)::S(C)
- Refutation
- Q(a);XB(A)
- Try
- R(B);
- Threat
- B(H)
- Vars
- R(c);CHECK,OGATE,XS(I)::QAB(E),XR(c)
- Q(a);N_GUARD,XB(A)::QAB(E)
- Q(a);N_GUARD,XR(B)::S(C)
- Q(a);N_GUARD::S(C),XQ(a)
- Q(a);N_GUARD::R1(B),XQ(a)
- Q(a);N_GUARD,P_PINP(J)::QAB(E)
- R(c);N_PINS(I)::S(I)
- R(c);N_PINS(I)::S(I),XP(e)
- Refutation
- R(c);
- Try
- R(B);CHECK
- Refutation
- R(c);N_PINS(I),XR(B)
- Try
- Q(E);
- Threat
- DUALS(2)
- Refutation
- R(c);CHECK,XS(I)
- Try
- Q(E);XP(e)
- Threat
- DUALS(2)
- Vars
- R(c);N_PINS(I)::QAB1(E)
- P(b);::QAB1(E)
- Refutation
- R(c);CHECK,XS(I)
- Try
- Actual
- Q(E);P_PINR(c)
- Threat
- QAB(E)
- Vars
- R(c);N_PINS(I),N_SPINR(c),XQ(E)::S(I)
- Q(a);N_GUARD,N_SPINR(c)::R1(B)
- R(c);N_PINS(I)::S(I),XP(e)
- P(e);N_GUARD,N_SPINR(c),S_CUTR(c)::R1(B)
- R(c);N_PINS(I)::S(I)
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).