MESON Chess Problem Database
Problem Display
PID: 254333 (1Q6/4p3/Kb4p1/2RN2B1/1p1k2n1/3p1pNb/B2R4/8 w - - 0 1)
Hoffmann, Bruno
Die Schwalbe, 1966
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Kxc5
- 2.Qxb6#
- 1...Bxc5
- 2.Qf4#
- 1...Sf2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se3
- 2.Bxe3#
- 1...Se5
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...Sh6
- 2.Be3#
- 1...Kxc5
- Tries
- 1.Kxb6?
- threat
- 2.Qf4#
- 1...Sf2
- 2.Be3#
- 1...Se5
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 1...e5!
- threat
- 1.Se2+?
- 1...Ke4
- 2.Qf4#
- 1...Kxc5
- 2.Qxb6#
- 1...fxe2!
- 1...Ke4
- 1.Sf5+?
- 1...Ke4
- 2.Qf4#
- 1...Kxc5
- 2.Qxb6#
- 1...gxf5!
- 1...Ke4
- 1.Sc3?
- threat
- 2.Rc4#
- 1...Kxc5
- 2.Qxb6#
- 1...Bxc5
- 2.Sb5#
- 1...bxc3
- 2.Rd5#
- 1...Bc7
- 2.Qxb4#
- 1...Se3
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...b3!
- threat
- 1.Se3?
- threat
- 2.Rc4#
- 1...Kxc5
- 2.Qxb6#
- 1...Sxe3
- 2.Qe5#
- 1...Bc7
- 2.Qxb4#
- 1...Se5
- 2.Qxe5#
- 1...Bxc5!
- threat
- 1.Sxb4?
- threat
- 2.Rc4#
- 1...Kxc5
- 2.Qxb6#
- 1...Bxc5
- 2.Rxd3#
- 1...Se3
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Bc7!
- threat
- 1.Sxb6?
- threat
- 2.Rc4#
- 1...Se3
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Kxc5!
- threat
- 1.Sxe7?
- threat
- 2.Rc4#
- 2.Qd6#
- 1...Kxc5
- 2.Qxb6#
- 1...Bc7
- 2.Qxb4#
- 1...Se3
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 2.Qd6#
- 1...Sf6
- 2.Rc4#
- 2.Qe5#
- 1...b3
- 2.Qd6#
- 1...Bxc5!
- threat
- 1.Rxd3+?
- 1...Kxc5
- 2.Qxb6#
- 1...Kxd3!
- 1...Kxc5
- 1.Rb5?
- threat
- 2.Qf4#
- 1...e5
- 2.Qxb6#
- 1...Sf2
- 2.Be3#
- 1...Se5
- 2.Be3#
- 2.Qxb6#
- 1...Sf6
- 2.Be3#
- 1...Bc7!
- threat
- 1.Qd6?
- threat
- 2.Sxe7#
- 2.Rc4#
- 1...Bxc5
- 2.Qf4#
- 1...e5
- 2.Sc3#
- 2.Se3#
- 2.Sxb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Rc4#
- 1...Bc7
- 2.Rc4#
- 1...Se3
- 2.Bxe3#
- 1...Se5
- 2.Sxe7#
- 2.Be3#
- 1...Sf6
- 2.Be3#
- 2.Rc4#
- 1...b3
- 2.Sxe7#
- 1...e6
- 2.Sc3#
- 2.Se3#
- 2.Sxb4#
- 2.Sxb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Rc4#
- 1...exd6!
- threat
- 1.Kxb6?
- Keys
- 1.Sf4!
- threat
- 2.Se6#
- 1...Ke3
- 2.Se6#
- 1...Kxc5
- 2.Qxb6#
- 1...Bxc5
- 2.Rxd3#
- 1...Sf2
- 2.Qe5#
- 1...Sh2
- 2.Qe5#
- 1...Se3
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Sf6
- 2.Qe5#
- 1...Sh6
- 2.Qe5#
- 1...e6
- 2.Sxe6#
- threat
- 1.Sf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 7
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- K(e);N_SPINP(a),OGATEB,S_FLIGHT,XR(D)::QAB1(H),XB(g)
- B(g);SBLOCK,XR(D)::QAR2(H)
- S(f);N_GUARD::B(F)
- S(f);N_GUARD::B(F),XS(f)
- Tries
- Try
- K(G);P-FLIGHT,XB(g)
- Threat
- QAR2(H)
- Vars
- S(f);N_GUARD::B(F)
- Refutation
- P(i);
- Try
- S(C);CHECK
- Vars
- K(e);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(H)
- K(e);N_GUARD,N_SPINP(a),S_CUTP(b),S_FLIGHT,XR(D)::QAB1(H),XB(g)
- Refutation
- P(b);XS(C)
- Try
- S(C);CHECK
- Vars
- K(e);N_GUARD,N_SPINP(a),P-FLIGHT::QAR1(H)
- K(e);N_GUARD,N_SPINP(a),S_CUTP(h),S_FLIGHT,XR(D)::QAB1(H),XB(g)
- Refutation
- P(h);XS(C)
- Try
- S(E);
- Threat
- R1(D)
- Vars
- K(e);N_SPINP(a),OGATEB,S_FLIGHT,XR(D)::QAB1(H),XB(g)
- B(g);SBLOCK,XR(D)::S(E)
- P(d);SBLOCK,XS(E)::R1(D)
- B(g);OGATE::QAR2(H),XP(d)
- S(f);N_GUARD::QAB1(H)
- S(f);N_GUARD::QAB1(H),XS(f)
- Refutation
- P(d);
- Try
- S(E);
- Threat
- R1(D)
- Vars
- K(e);N_SPINP(a),OGATEB,S_FLIGHT,XR(D)::QAB1(H),XB(g)
- S(f);N_GUARD,XS(E)::QAB1(H)
- B(g);OGATE::QAR2(H),XP(d)
- S(f);N_GUARD::QAB1(H),XS(f)
- Refutation
- B(g);XR(D)
- Try
- S(E);XP(d)
- Threat
- R1(D)
- Vars
- K(e);N_SPINP(a),OGATEB,S_FLIGHT,XR(D)::QAB1(H),XB(g)
- B(g);SBLOCK,XR(D)::R1(B),XP(a)
- S(f);N_GUARD::QAB1(H)
- S(f);N_GUARD::QAB1(H),XS(f)
- Refutation
- B(g);
- Try
- S(E);XB(g)
- Threat
- R1(D)
- Vars
- S(f);N_GUARD::QAB1(H)
- S(f);N_GUARD::QAB1(H),XS(f)
- Refutation
- K(e);N_SPINP(a),S_FLIGHT,XR(D)
- Try
- S(E);XP(i)
- Threat
- DUALS(2)
- Vars
- K(e);N_SPINP(a),OGATEB,S_FLIGHT,XR(D)::QAB1(H),XB(g)
- B(g);OGATE::QAR2(H),XP(d)
- S(f);N_GUARD::QAB1(H)
- P(d);::QAR2(H)
- Refutation
- B(g);XR(D)
- Try
- R(B);CHECK,XP(a)
- Vars
- K(e);N_GUARD,S_FLIGHT,XR(D)::QAB1(H),XB(g)
- Refutation
- K(e);P-FLIGHT,XR(B)
- Try
- R(D);
- Threat
- QAR2(H)
- Vars
- P(i);SBLOCK::QAB(H),XB(g)
- S(f);N_GUARD::B(F)
- Refutation
- B(g);
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- B(g);SBLOCK,XR(D)::QAR2(H)
- B(g);::R1(D)
- S(f);N_GUARD::B(F),XS(f)
- P(d);::QAR(H)+S(E),XP(i)
- Refutation
- P(i);XQ(H)
- Try
- Actual
- S(E);
- Threat
- S(E)
- Vars
- K(e);N_SPINP(a),S_FLIGHT::B(F)+S(E)
- K(e);N_SPINP(a),OGATEB,S_FLIGHT,XR(D)::QAB1(H),XB(g)
- B(g);SBLOCK,XR(D)::R1(B),XP(a)
- S(f);N_GUARD::QAB1(H)
- S(f);N_GUARD::QAB1(H),XS(f)
- P(i);::S(E),XP(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).