MESON Chess Problem Database
Problem Display
PID: 113135 (8/2p5/4pK2/N1kbP3/1Rq5/B7/1PQP4/8 w - - 0 1)
Ort, Josef
Source?, 1908
#2
8 + 5
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Kd4
- 2.Sb3#
- 1...Qxc2
- 2.d4#
- 1...Qc3
- 2.d4#
- 1...Bh1
- 2.Qxc4#
- 1...Bg2
- 2.Qxc4#
- 1...Bf3
- 2.Qxc4#
- 1...Be4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc4#
- 1...Bb7
- 2.Qxc4#
- 1...Ba8
- 2.Qxc4#
- 1...c6
- 2.Sb3#
- 1...Kd4
- Tries
- 1.Kg5?
- 1...Qxc2
- 2.d4#
- 1...Bh1
- 2.Qxc4#
- 1...Bg2
- 2.Qxc4#
- 1...Bf3
- 2.Qxc4#
- 1...Be4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc4#
- 1...Bb7
- 2.Qxc4#
- 1...Ba8
- 2.Qxc4#
- 1...Qc3
- 2.d4#
- 1...c6
- 2.Sb3#
- 1...Kd4!
- 1...Qxc2
- 1.Ke7?
- 1...Qxc2
- 2.d4#
- 1...Bh1
- 2.Qxc4#
- 1...Bg2
- 2.Qxc4#
- 1...Bf3
- 2.Qxc4#
- 1...Be4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc4#
- 1...Bb7
- 2.Qxc4#
- 1...Ba8
- 2.Qxc4#
- 1...Qc3
- 2.d4#
- 1...c6
- 2.Sb3#
- 1...Kd4!
- 1...Qxc2
- 1.Kf7?
- 1...Qxc2
- 2.d4#
- 1...Bh1
- 2.Qxc4#
- 1...Bg2
- 2.Qxc4#
- 1...Bf3
- 2.Qxc4#
- 1...Be4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc4#
- 1...Bb7
- 2.Qxc4#
- 1...Ba8
- 2.Qxc4#
- 1...Qc3
- 2.d4#
- 1...c6
- 2.Sb3#
- 1...Kd4!
- 1...Qxc2
- 1.Kg7?
- 1...Qxc2
- 2.d4#
- 1...Bh1
- 2.Qxc4#
- 1...Bg2
- 2.Qxc4#
- 1...Bf3
- 2.Qxc4#
- 1...Be4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc4#
- 1...Bb7
- 2.Qxc4#
- 1...Ba8
- 2.Qxc4#
- 1...Qc3
- 2.d4#
- 1...c6
- 2.Sb3#
- 1...Kd4!
- 1...Qxc2
- 1.Qc1?
- 1...Qxc1
- 2.d4#
- 1...Bh1
- 2.Qxc4#
- 1...Bg2
- 2.Qxc4#
- 1...Bf3
- 2.Qxc4#
- 1...Be4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc4#
- 1...Bb7
- 2.Qxc4#
- 1...Ba8
- 2.Qxc4#
- 1...Qc2
- 2.Qg1#
- 2.d4#
- 1...Qc3
- 2.d4#
- 1...c6
- 2.Sb3#
- 1...Kd4!
- 1...Qxc1
- 1.Qc3?
- threat
- 2.Rb3#
- 2.Rb7#
- 2.Rb8#
- 2.d4#
- 1...Bh1
- 2.Qxc4#
- 1...Bg2
- 2.Qxc4#
- 1...Bf3
- 2.Qxc4#
- 1...Be4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc4#
- 1...Bb7
- 2.Qxc4#
- 1...Ba8
- 2.Qxc4#
- 1...Qxc3!
- threat
- 1.d3?
- 1...Qxc2
- 2.d4#
- 1...Bh1
- 2.Qxc4#
- 1...Bg2
- 2.Qxc4#
- 1...Bf3
- 2.Qxc4#
- 1...Be4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc4#
- 1...Bb7
- 2.Qxc4#
- 1...Ba8
- 2.Qxc4#
- 1...Qc3
- 2.d4#
- 1...c6
- 2.Sb3#
- 1...Kd4!
- 1...Qxc2
- 1.Kg5?
- Keys
- 1.Qb3!
- threat
- 2.Rxc4#
- 1...Qf1+
- 2.Rf4#
- 1...Qf4+
- 2.Rxf4#
- 1...Qh4+
- 2.Rxh4#
- 1...Kd4
- 2.Qe3#
- 1...Qxb3
- 2.d4#
- 1...Qxb4
- 2.Qxb4#
- 1...Bh1
- 2.Qxc4#
- 1...Bg2
- 2.Qxc4#
- 1...Bf3
- 2.Qxc4#
- 1...Be4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc4#
- 1...Bb7
- 2.Qxc4#
- 1...Ba8
- 2.Qxc4#
- 1...Qe2
- 2.Ra4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.d4#
- 1...Qd3
- 2.Ra4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Qb5
- 2.Qe3#
- 1...Qa6
- 2.Ra4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Qe3#
- 2.d4#
- 1...Qc1
- 2.Ra4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Qe3#
- 2.d4#
- 1...Qc2
- 2.Ra4#
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 2.Qe3#
- 2.d4#
- 1...Qc3
- 2.Rc4#
- 1...Qd4
- 2.Rc4#
- 2.Rb5#
- 1...Qe4
- 2.Rc4#
- 2.Rxe4#
- 1...Qg4
- 2.Rc4#
- 2.Re4#
- 2.Rf4#
- 2.Rxg4#
- threat
- 1.Qb3!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 6
- REMOVED MATES = 2
- Sets
- K(b);S_FLIGHT::S(F)
- Q(a);N_SPINQ(a),XQ(B)::P(C)
- Q(a);P_PINP(G)::P(C)
- B(c);N_GUARD::QAR1(B),XQ(a)
- P(e);SBLOCK::S(F)
- Tries
- Try
- K(H);S_FLIGHT
- Vars
- Q(a);N_SPINQ(a),XQ(B)::P(C)
- B(c);N_GUARD::QAR1(B),XQ(a)
- Q(a);::P(C)
- P(e);SBLOCK::S(F)
- Refutation
- K(b);S_FLIGHT
- Try
- K(H);S_FLIGHT
- Vars
- Q(a);N_SPINQ(a),XQ(B)::P(C)
- B(c);N_GUARD::QAR1(B),XQ(a)
- Q(a);::P(C)
- P(e);SBLOCK::S(F)
- Refutation
- K(b);S_FLIGHT
- Try
- K(H);P-FLIGHT
- Vars
- Q(a);N_SPINQ(a),XQ(B)::P(C)
- B(c);N_GUARD::QAR1(B),XQ(a)
- Q(a);::P(C)
- P(e);SBLOCK::S(F)
- Refutation
- K(b);S_FLIGHT
- Try
- K(H);S_FLIGHT
- Vars
- Q(a);N_SPINQ(a),XQ(B)::P(C)
- B(c);N_GUARD::QAR1(B),XQ(a)
- Q(a);P_PINP(G)::P(C)
- P(e);SBLOCK::S(F)
- Refutation
- K(b);S_FLIGHT
- Try
- Q(B);
- Vars
- Q(a);N_SPINQ(a),XQ(B)::P(C)
- B(c);N_GUARD::QAR1(B),XQ(a)
- Q(a);P_PINP(G)::P(C)
- P(e);SBLOCK::S(F)
- Refutation
- K(b);S_FLIGHT
- Try
- Q(B);
- Threat
- DUALS(4)
- Vars
- B(c);N_GUARD::QAR1(B),XQ(a)
- Refutation
- Q(a);N_SPINQ(a),P_PINP(G),XQ(B)
- Try
- P(C);
- Vars
- Q(a);N_SPINQ(a),XQ(B)::P(C)
- B(c);N_GUARD::QAR1(B),XQ(a)
- Q(a);P_PINP(G)::P(C)
- P(e);SBLOCK::S(F)
- Refutation
- K(b);S_FLIGHT
- Try
- Actual
- Q(B);N_PINQ(a)
- Threat
- B(D)+R(E),DCHECK,XQ(a)
- Vars
- Q(a);CHECK,OGATE::B(D)+R(E)
- Q(a);CHECK,OGATE::B(D)+R(E),XQ(a)
- K(b);P_SPINQ(a),S_FLIGHT::QAB1(B)
- Q(a);N_GUARD,XQ(B)::P(C)
- Q(a);OGATE,P_SPINQ(a),XR(E)::QAB1(B),XQ(a)
- B(c);N_GUARD::QAR1(B),XQ(a)
- Q(a);N_GUARD::QAB(B)
- Q(a);P_PINP(G)::B(D)+R(E),DCHECK
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).