MESON Chess Problem Database
Problem Display
PID: 235276 (3N4/n2r1r1p/Q2P1p1K/2kBB3/5Rb1/P2R4/1pq2b2/2N3n1 w - - 0 1)
Hoffmann, Fritz
Schach, 1967
#2
10 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sb3#
- 2.Rc4#
- 1...Qd1
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qe2
- 2.Sb3#
- 2.Rc4#
- 1...Qc4
- 2.Rxc4#
- 1...Rxd6
- 2.Bxd6#
- 1...Bd1
- 2.Se6#
- 1...Be2
- 2.Se6#
- 1...Bf3
- 2.Se6#
- 1...Bh5
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Sb5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qa5#
- 2.Qc6#
- 1...f5
- 2.Se6#
- 1...Qb1
- Tries
- 1.Bh1?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qc4
- 2.Rxc4#
- 1...Bd4
- 2.Bxd4#
- 1...Bf3
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Sf3!
- threat
- 1.Bg2?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qc4
- 2.Rxc4#
- 1...Bd4
- 2.Bxd4#
- 1...Bf3
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Sf3!
- threat
- 1.Bb3?
- threat
- 2.Rd5#
- 1...Qxb3
- 2.Sxb3#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qc4
- 2.Rxc4#
- 1...Bd4
- 2.Bxd4#
- 1...Bf3
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Qd2!
- threat
- 1.Bf3?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Bxf3
- 2.Se6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qc4
- 2.Rxc4#
- 1...Bd4
- 2.Bxd4#
- 1...Be6
- 2.Sxe6#
- 1...Sxf3!
- threat
- 1.Bc4?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Qxc4
- 2.Rxc4#
- 1...Rxd6
- 2.Bxd6#
- 2.Qxd6#
- 1...Qd2
- 2.Sb3#
- 1...Bd4
- 2.Bxd4#
- 1...Bf3
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Qd1!
- threat
- 1.Be4?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Sb5
- 2.Qc6#
- 1...Qd1
- 2.Rc3#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Bd4
- 2.Bxd4#
- 1...Be6
- 2.Sxe6#
- 1...Qc4!
- threat
- 1.Bc6?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Sxc6
- 2.Qxc6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qc4
- 2.Rxc4#
- 1...Bf3
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Bd4!
- threat
- 1.Be6?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Bxe6
- 2.Sxe6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qc4
- 2.Rxc4#
- 1...Bd4
- 2.Bxd4#
- 1...Bf3!
- threat
- 1.Bb7?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qc4
- 2.Rxc4#
- 1...Bd4
- 2.Bxd4#
- 1...Bf3
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Sc6
- 2.Qxc6#
- 1...Rxb7!
- threat
- 1.Bxf7?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Sb7#
- 2.Bxd6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qc4
- 2.Rxc4#
- 1...Bd4
- 2.Bxd4#
- 1...Bf3
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Rxf7!
- threat
- 1.Ba8?
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qc4
- 2.Rxc4#
- 1...Bd4
- 2.Bxd4#
- 1...Bf3
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- 1...Sc6
- 2.Qxc6#
- 1...Rb7!
- threat
- 1.Qxa7+?
- 1...Kb5
- 2.Rb4#
- 1...Rxa7!
- 1...Kb5
- 1.Bh1?
- Keys
- 1.Ba2!
- threat
- 2.Rd5#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxd6
- 2.Bxd6#
- 1...Qd1
- 2.Rc3#
- 2.Rc4#
- 1...Qb3
- 2.Sxb3#
- 1...Qd2
- 2.Sb3#
- 1...Qc4
- 2.Rxc4#
- 1...Bd4
- 2.Bxd4#
- 1...Bf3
- 2.Se6#
- 1...Be6
- 2.Sxe6#
- threat
- 1.Ba2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 7
- Sets
- Q(c);N_GUARD::R1(D)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
- S(h);N_GUARD::QAR1(G)
- S(h);N_GUARD::QAR1(G),XS(h)
- P(g);S_CUTB(e)::S(J)
- Tries
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
- Refutation
- S(a);
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
- Refutation
- S(a);
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XB(E)::S(A),XQ(c)
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
- Refutation
- Q(c);P_PINR(D)
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- B(e);N_GUARD,XB(E)::S(J)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J),XB(e)
- Refutation
- S(a);XB(E)
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- Q(c);OGATE,XB(E)::R1(D),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
- Refutation
- Q(c);
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- S(h);N_GUARD::QAR1(G)
- Q(c);N_GUARD::R(C)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J),XB(e)
- Refutation
- Q(c);
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- S(h);OGATE,XB(E)::QAR1(G),XS(h)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
- Refutation
- B(d);
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- B(e);XB(E)::S(J),XB(e)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(d);N_GUARD::B(F),XB(d)
- Refutation
- B(e);
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
- S(h);N_GUARD::QAR1(G),XS(h)
- Refutation
- R(i);XB(E)
- Try
- B(E);XR(j)
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
- Refutation
- R(i);XB(E)
- Try
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
- S(h);N_GUARD::QAR1(G),XS(h)
- Refutation
- R(i);
- Try
- Q(G);CHECK,XS(h)
- Vars
- K(f);P-FLIGHT::R1(D)
- Refutation
- R(i);XQ(G)
- Try
- Actual
- B(E);
- Threat
- R1(C)
- Vars
- Q(c);XR(C)::S(A),XQ(c)
- R(i);OGATE,XP(H)::B(F),XR(i)
- Q(c);N_GUARD::S(A),XQ(c)
- Q(c);N_GUARD,P_PINR(D)::S(A)
- Q(c);N_GUARD::R1(D),XQ(c)
- B(d);N_GUARD::B(F),XB(d)
- B(e);N_GUARD::S(J)
- B(e);N_GUARD::S(J),XB(e)
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).