MESON Chess Problem Database
Problem Display
PID: 12189 (3r1b2/1pBQNp2/p2K2P1/2NB4/4pkpP/q1p1R3/p4P2/8 w - - 0 1)
Hoffmann, Fritz
2nd HM., Blikeng TT, 1976
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxc5+
- 2.Kxc5#
- 1...Rxd7+
- 2.Kxd7#
- 1...Ra8
- 2.Qf5#
- 1...Rb8
- 2.Qf5#
- 1...Rc8
- 2.Qf5#
- 1...Re8
- 2.Qf5#
- 1...Bxe7+
- 2.Kxe7#
- 1...b5
- 2.Kc6#
- 1...b6
- 2.Kc6#
- 1...fxg6
- 2.Ke6#
- 1...f5
- 2.Ke6#
- 1...f6
- 2.Ke6#
- 1...Qxc5+
- Tries
- 1.Bc4?
- threat
- 2.Kd5#
- 1...Qxc5+
- 2.Kxc5#
- 1...Rxd7+
- 2.Kxd7#
- 1...Bxe7+
- 2.Kxe7#
- 1...Rc8
- 2.Qf5#
- 1...Bg7
- 2.Sd5#
- 1...Qa5!
- threat
- 1.Bxb7?
- threat
- 2.Kd5#
- 2.Kc6#
- 1...Qxc5+
- 2.Kxc5#
- 1...Rxd7+
- 2.Kxd7#
- 1...Bxe7+
- 2.Kxe7#
- 1...Qb3
- 2.Kc6#
- 1...Qa4
- 2.Kd5#
- 1...Rc8
- 2.Qf5#
- 1...Bg7
- 2.Sd5#
- 1...Qa5!
- threat
- 1.Bxf7?
- threat
- 2.Kd5#
- 2.Ke6#
- 1...Qxc5+
- 2.Kxc5#
- 1...Rxd7+
- 2.Kxd7#
- 1...Bxe7+
- 2.Kxe7#
- 1...Qa5
- 2.Se6#
- 1...Rc8
- 2.Qf5#
- 1...Bg7
- 2.Sd5#
- 1...g3
- 2.Kd5#
- 1...Qb3!
- threat
- 1.gxf7?
- threat
- 2.Ke6#
- 1...Qxc5+
- 2.Kxc5#
- 1...Rxd7+
- 2.Kxd7#
- 1...Bxe7+
- 2.Kxe7#
- 1...Qa5
- 2.Se6#
- 1...Rc8
- 2.Qf5#
- 1...Bg7
- 2.Sg6#
- 1...g3!
- threat
- 1.Bc4?
- Keys
- 1.Bxe4!
- threat
- 2.Kd5#
- 1...Qxc5+
- 2.Kxc5#
- 1...Rxd7+
- 2.Kxd7#
- 1...Bxe7+
- 2.Kxe7#
- 1...Qa5
- 2.Sd3#
- 1...Qb3
- 2.Sd3#
- 1...Rc8
- 2.Qf5#
- 1...Bg7
- 2.Sd5#
- threat
- 1.Bxe4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- Q(b);CHECK,P_PINS(J),XS(D)::B(H)+K(F),XQ(b)
- R(j);CHECK,XQ(I)::B(H)+K(F),XR(j)
- R(j);N_PINQ(I)::QAR1(I)
- B(k);CHECK,XS(J)::B(H)+K(F),XB(k)
- P(h);::B(H)+K(F)
- P(i);XP(G)::B(H)+K(F)
- P(i);::B(H)+K(F)
- Tries
- Try
- B(E);
- Threat
- B(H)+K(F)
- Vars
- Q(b);CHECK,P_PINS(J),XS(D)::B(H)+K(F),XQ(b)
- R(j);CHECK,XQ(I)::B(H)+K(F),XR(j)
- B(k);CHECK,XS(J)::B(H)+K(F),XB(k)
- R(j);N_PINQ(I)::QAR1(I)
- B(k);::S(J)
- Refutation
- Q(b);N_PINS(D),P_PINS(J)
- Try
- B(E);XP(h)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,P_PINS(J),XS(D)::B(H)+K(F),XQ(b)
- R(j);CHECK,XQ(I)::B(H)+K(F),XR(j)
- B(k);CHECK,XS(J)::B(H)+K(F),XB(k)
- Q(b);N_PINS(D),P_PINS(J)::B(H)+K(F)
- R(j);N_PINQ(I)::QAR1(I)
- B(k);::S(J)
- Refutation
- Q(b);N_PINS(D),P_PINS(J)
- Try
- B(E);XP(i)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,P_PINS(J),XS(D)::B(H)+K(F),XQ(b)
- R(j);CHECK,XQ(I)::B(H)+K(F),XR(j)
- B(k);CHECK,XS(J)::B(H)+K(F),XB(k)
- Q(b);N_PINS(D),P_PINS(J)::S(D)
- R(j);N_PINQ(I)::QAR1(I)
- B(k);::S(J)
- P(f);::B(H)+K(F)
- Refutation
- Q(b);N_PINS(D),P_PINS(J)
- Try
- P(G);XP(i)
- Threat
- B(H)+K(F)
- Vars
- Q(b);CHECK,P_PINS(J),XS(D)::B(H)+K(F),XQ(b)
- R(j);CHECK,XQ(I)::B(H)+K(F),XR(j)
- B(k);CHECK,XS(J)::B(H)+K(F),XB(k)
- Q(b);N_PINS(D),P_PINS(J)::S(D)
- R(j);N_PINQ(I)::QAR1(I)
- B(k);::S(J)
- Refutation
- P(f);
- Try
- Actual
- B(E);XP(d)
- Threat
- B(H)+K(F)
- Vars
- Q(b);CHECK,P_PINS(J),XS(D)::B(H)+K(F),XQ(b)
- R(j);CHECK,XQ(I)::B(H)+K(F),XR(j)
- B(k);CHECK,XS(J)::B(H)+K(F),XB(k)
- Q(b);N_PINS(D),P_PINS(J)::S(D)
- R(j);N_PINQ(I)::QAR1(I)
- B(k);::S(J)
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).