MESON Chess Problem Database
Problem Display
PID: 836 (3Q4/3Bqrp1/1pN2kp1/1P4b1/p3p1RN/1bK3P1/p7/B7 w - - 0 1)
Strydom, Jan
2nd Place, British Chess Magazine Task Ty., 1969
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxd8
- 2.Kb4#
- 1...Rf8
- 2.Qxe7#
- 1...Bd1
- 2.Kc4#
- 1...Bc2
- 2.Kxc2#
- 2.Kc4#
- 1...Bc4
- 2.Kc2#
- 2.Kxc4#
- 1...Bd5
- 2.Kc2#
- 1...Be6
- 2.Kc2#
- 1...Bc1
- 2.Rxg6#
- 1...Bd2+
- 2.Kxd2#
- 1...Be3
- 2.Rxg6#
- 1...Bf4
- 2.Rxg6#
- 1...Bxh4
- 2.Kd2#
- 1...Bh6
- 2.Rxg6#
- 1...a3
- 2.Kxb3#
- 1...e3
- 2.Kd3#
- 1...Qxd8
- Tries
- 1.Kd4?
- 1...Be3+
- 2.Kxe3#
- 1...Qxd8
- 2.Kxe4#
- 1...Bxh4
- 2.Ke3#
- 1...Rf8
- 2.Qxe7#
- 1...Bd1
- 2.Kc4#
- 2.Kd5#
- 1...Bc2
- 2.Kc4#
- 2.Kd5#
- 1...Bc4
- 2.Kxc4#
- 1...Bd5
- 2.Kxd5#
- 1...Be6
- 2.Kxe4#
- 1...Bc1
- 2.Rxg6#
- 1...Bd2
- 2.Rxg6#
- 1...Bf4
- 2.Rxg6#
- 1...Bh6
- 2.Rxg6#
- 1...e3
- 2.Kd3#
- 1...a3!
- 1...Be3+
- 1.Bc8?
- 1...Bd2+
- 2.Kxd2#
- 1...Bxh4
- 2.Kd2#
- 1...Rf8
- 2.Qxe7#
- 1...Bc1
- 2.Rxg6#
- 1...Bd1
- 2.Kc4#
- 1...Bc2
- 2.Kxc2#
- 2.Kc4#
- 1...Bc4
- 2.Kc2#
- 2.Kxc4#
- 1...Bd5
- 2.Kc2#
- 1...Be6
- 2.Kc2#
- 2.Qd4#
- 1...Be3
- 2.Rxg6#
- 1...Bf4
- 2.Rxg6#
- 1...Bh6
- 2.Rxg6#
- 1...a3
- 2.Kxb3#
- 1...e3
- 2.Kd3#
- 1...Qxd8!
- 1...Bd2+
- 1.Rxg5?
- threat
- 2.Rxg6#
- 1...Rf8
- 2.Qxe7#
- 1...Kxg5!
- threat
- 1.Kd4?
- Keys
- 1.Kb2!
- 1...Bc1+
- 2.Kxc1#
- 1...a3+
- 2.Kxb3#
- 1...Qxd8
- 2.Ka3#
- 1...Bxh4
- 2.Kc1#
- 1...Rf8
- 2.Qxe7#
- 1...Bd1
- 2.Kxa2#
- 1...Bc2
- 2.Kxa2#
- 2.Kxc2#
- 1...Bc4
- 2.Kc2#
- 1...Bd5
- 2.Kc2#
- 1...Be6
- 2.Kc2#
- 1...Bd2
- 2.Rxg6#
- 1...Be3
- 2.Rxg6#
- 1...Bf4
- 2.Rxg6#
- 1...Bh6
- 2.Rxg6#
- 1...e3
- 2.Kc1#
- 1...Bc1+
- 1.Kb2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(i);N_SPINQ(i),XQ(I)::B(A)+K(B)
- R(j);N_GUARD::QAB1(I),XQ(i)
- B(b);::B(A)+K(B)
- B(e);OGATE::R1(D),XP(h)
- B(e);CHECK::B(A)+K(B),XB(e)
- B(e);XS(E)::B(A)+K(B)
- P(c);::B(A)+K(B),XB(b)
- P(d);::B(A)+K(B)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- B(e);CHECK::B(A)+K(B),XB(e)
- Q(i);N_SPINQ(i),P_PINB(H),XQ(I)::B(A)+K(B),XP(d)
- B(e);XS(E)::B(A)+K(B)
- R(j);N_GUARD::QAB1(I),XQ(i)
- B(b);::B(A)+K(B),XB(b)
- B(b);::B(A)+K(B),XP(d)
- B(e);OGATE::R1(D),XP(h)
- P(d);::B(A)+K(B)
- Refutation
- P(c);
- Try
- B(H);
- Vars
- B(e);CHECK::B(A)+K(B),XB(e)
- B(e);XS(E)::B(A)+K(B)
- R(j);N_GUARD::QAB1(I),XQ(i)
- B(e);OGATE::R1(D),XP(h)
- B(b);::B(A)+K(B)
- P(c);::B(A)+K(B),XB(b)
- P(d);::B(A)+K(B)
- Refutation
- Q(i);N_SPINQ(i),XQ(I)
- Try
- R(D);XB(e)
- Threat
- R1(D),XP(h)
- Vars
- R(j);N_GUARD::QAB1(I),XQ(i)
- Refutation
- K(g);S_FLIGHT,XR(D)
- Try
- Actual
- K(B);S_FLIGHT
- Vars
- B(e);CHECK::B(A)+K(B),XB(e)
- P(c);CHECK::B(A)+K(B),XB(b)
- Q(i);N_SPINQ(i),XQ(I)::B(A)+K(B)
- B(e);XS(E)::B(A)+K(B)
- R(j);N_GUARD::QAB1(I),XQ(i)
- B(b);::B(A)+K(B),XP(a)
- B(b);::B(A)+K(B)
- B(e);OGATE::R1(D),XP(h)
- P(d);::B(A)+K(B)
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).