MESON Chess Problem Database
Problem Display
PID: 203719 (1q6/b4N2/7P/3b1P1k/4p3/3N2Q1/3r2RK/4B2R w - - 0 1)
Draper, H Jack
The Problemist, 1984
#2
9 + 6
SOLUTION
- SOUND
- Sets
- 1...Qxg3+
- 2.Kxg3#
- 1...Qf4
- 2.Sxf4#
- 1...Qb1
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qb2
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qb3
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qb4
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qb5
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qb6
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 1...Qb7
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qa8
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qc8
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qd8
- 2.Sf4#
- 2.Qg4#
- 2.Qg6#
- 1...Qe8
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qf8
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qg8
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 1...Qh8
- 2.Sf4#
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Rf2
- 2.Kg1#
- 1...Rxg2+
- 2.Kxg2#
- 1...Bg1+
- 2.Kxg1#
- 1...e3
- 2.Kg1#
- 1...Qxg3+
- Tries
- 1.Kh3?
- threat
- 2.Qh4#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qxg3+
- 2.Kxg3#
- 1...Rxg2
- 2.Kxg2#
- 2.Qh4#
- 1...Bxf7
- 2.Qh4#
- 2.Qg5#
- 1...Qf4
- 2.Sxf4#
- 2.Qg6#
- 1...Qd6
- 2.Qh4#
- 2.Qg4#
- 2.Qg5#
- 1...Qb6
- 2.Sf4#
- 2.Qh4#
- 2.Qg4#
- 2.Qg5#
- 1...Qd8
- 2.Sf4#
- 2.Qg4#
- 2.Qg6#
- 1...Qg8
- 2.Sf4#
- 2.Qh4#
- 1...Bf2
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Be3
- 2.Qh4#
- 2.Qg4#
- 2.Qg6#
- 1...Rxd3!
- threat
- 1.Sde5?
- threat
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Rxg2+
- 2.Kxg2#
- 1...Bg1+
- 2.Kxg1#
- 1...Bxf7
- 2.Qh4#
- 2.Qh3#
- 2.Qg5#
- 1...Qd6
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 1...Qb3
- 2.Qh4#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Qb6
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 1...Qd8
- 2.Qg4#
- 2.Qg6#
- 1...Qg8
- 2.Qh4#
- 2.Qh3#
- 1...Rf2
- 2.Kg1#
- 2.Qh3#
- 2.Qg4#
- 2.Qg5#
- 1...Rd3
- 2.Qh4#
- 2.Qg4#
- 2.Qg5#
- 2.Qg6#
- 1...Bf2
- 2.Qg4#
- 2.Qg5#
- 1...Be3
- 2.Qh4#
- 2.Qh3#
- 2.Qg4#
- 2.Qg6#
- 1...Qxe5!
- threat
- 1.Sfe5?
- threat
- 2.Qh4#
- 2.Qh3#
- 2.Qg5#
- 2.Qg6#
- 1...Rxg2+
- 2.Kxg2#
- 1...Bg1+
- 2.Kxg1#
- 1...Kxh6
- 2.Qh4#
- 2.Qh3#
- 2.Qg6#
- 1...Rxd3
- 2.Qh4#
- 2.Qg5#
- 2.Qg6#
- 1...Qd6
- 2.Qh4#
- 2.Qh3#
- 2.Qg5#
- 1...Qb6
- 2.Qh4#
- 2.Qh3#
- 2.Qg5#
- 1...Qd8
- 2.Qg6#
- 1...Qe8
- 2.Qh4#
- 2.Qh3#
- 2.Qg5#
- 1...Qg8
- 2.Qh4#
- 2.Qh3#
- 1...Rf2
- 2.Kg1#
- 2.Qh3#
- 2.Qg5#
- 1...Bf7
- 2.Qh4#
- 2.Qh3#
- 2.Qg5#
- 1...Bf2
- 2.Qg5#
- 1...Be3
- 2.Qh4#
- 2.Qh3#
- 2.Qg6#
- 1...Qxe5!
- threat
- 1.Sd6?
- threat
- 2.Qh4#
- 2.Qh3#
- 2.Qg5#
- 2.Qg6#
- 1...Rxg2+
- 2.Kxg2#
- 1...Bg1+
- 2.Kxg1#
- 1...Kxh6
- 2.Qh4#
- 2.Qh3#
- 2.Qg6#
- 1...Rxd3
- 2.Qh4#
- 2.Qg5#
- 2.Qg6#
- 1...Qd8
- 2.Qg6#
- 1...Qe8
- 2.Qh4#
- 2.Qh3#
- 2.Qg5#
- 1...Qg8
- 2.Qh4#
- 2.Qh3#
- 1...Rf2
- 2.Kg1#
- 2.Qh3#
- 2.Qg5#
- 1...Bf7
- 2.Qh4#
- 2.Qh3#
- 2.Qg5#
- 1...Bf2
- 2.Qg5#
- 1...Be3
- 2.Qh4#
- 2.Qh3#
- 2.Qg6#
- 1...Qxd6!
- threat
- 1.Kh3?
- Keys
- 1.Qf4!
- threat
- 2.Kg3#
- 1...Qxf4+
- 2.Sxf4#
- 1...Rxg2+
- 2.Kxg2#
- 1...Bg1+
- 2.Kxg1#
- 1...Rxd3
- 2.Rg5#
- 1...Qd8
- 2.Qg4#
- 1...Qg8
- 2.Qh4#
- 1...Bf2
- 2.Rg5#
- threat
- 1.Qf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 3
- Sets
- Q(f);CHECK,XQ(F)::R(B)+K(D),XQ(f)
- Q(f);N_GUARD::S(E),XQ(f)
- R(a);::R(B)+K(D)
- R(a);CHECK,XR(C)::R(B)+K(D),XR(a)
- B(e);CHECK::R(B)+K(D),XB(e)
- P(b);::R(B)+K(D)
- Tries
- Try
- K(D);N_SPINQ(F),N_SPINR(C),P-FLIGHT
- Threat
- DUALS(4)
- Vars
- Q(f);CHECK,XQ(F)::R(B)+K(D),XQ(f)
- Refutation
- R(a);P_PINQ(F),XS(E)
- Try
- S(E);N_SPINQ(F)
- Threat
- DUALS(5)
- Vars
- R(a);CHECK,XR(C)::R(B)+K(D),XR(a)
- B(e);CHECK::R(B)+K(D),XB(e)
- Refutation
- Q(f);P_PINQ(F),XS(E)
- Try
- S(I);N_SPINQ(F)
- Threat
- DUALS(4)
- Vars
- R(a);CHECK,XR(C)::R(B)+K(D),XR(a)
- B(e);CHECK::R(B)+K(D),XB(e)
- Q(f);::QAB1(F)
- B(e);N_PINR(C)::QAR1(F)
- Refutation
- Q(f);P_PINQ(F),XS(I)
- Try
- S(I);N_SPINQ(F)
- Threat
- DUALS(4)
- Vars
- R(a);CHECK,XR(C)::R(B)+K(D),XR(a)
- B(e);CHECK::R(B)+K(D),XB(e)
- Q(f);::QAB1(F)
- B(e);N_PINR(C)::QAR1(F)
- Refutation
- Q(f);P_PINQ(F),XS(I)
- Try
- Actual
- Q(F);
- Threat
- R(B)+K(D)
- Vars
- Q(f);CHECK,XQ(F)::S(E),XQ(f)
- R(a);CHECK,XR(C)::R(B)+K(D),XR(a)
- B(e);CHECK::R(B)+K(D),XB(e)
- R(a);N_PINR(C),XS(E)::R1(C)
- Q(f);N_PINQ(F)::QAB1(F)
- Q(f);N_PINQ(F)::QAR1(F)
- B(e);N_PINR(C)::R1(C)
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).