MESON Chess Problem Database
Problem Display
PID: 231232 (8/8/1p2N3/pP6/K5P1/2Qpkp2/4p3/6RB w - - 0 1)
Christiansson, E
1st Prize, Bergslagen Ty., 1927
#2
7 + 6
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Kf2
- 2.Qd4#
- 1...Ke4
- 2.Qd4#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...f2
- 2.Rg3#
- 1...Kf2
- Tries
- 1.Ka3?
- 1...Kf2
- 2.Qd4#
- 1...Ke4
- 2.Qd4#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...f2
- 2.Rg3#
- 1...a4!
- 1...Kf2
- 1.Kb3?
- 1...Kf2
- 2.Qd4#
- 1...Ke4
- 2.Qd4#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...f2
- 2.Rg3#
- 1...a4+!
- 1...Kf2
- 1.Rg2?
- 1...Ke4
- 2.Qd4#
- 1...f2
- 2.Rg3#
- 1...e1Q
- 2.Qxe1#
- 2.Qd4#
- 2.Qe5#
- 1...e1S
- 2.Qxe1#
- 2.Qd4#
- 2.Qe5#
- 1...e1B
- 2.Qxe1#
- 2.Qd4#
- 2.Qe5#
- 1...e1R
- 2.Qxe1#
- 2.Qd4#
- 2.Qe5#
- 1...fxg2!
- 1...Ke4
- 1.Rg3?
- 1...Ke4
- 2.Qd4#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...Kf2!
- 1...Ke4
- 1.Qa1?
- 1...Kd2
- 2.Qc1#
- 1...Kf2
- 2.Qd4#
- 1...Ke4
- 2.Qd4#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...d2
- 2.Qd4#
- 1...f2!
- 1...Kd2
- 1.Qb4?
- 1...Kf2
- 2.Qd4#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...d2
- 2.Qd4#
- 1...f2
- 2.Rg3#
- 2.Qf4#
- 1...axb4!
- 1...Kf2
- 1.Qe5+?
- 1...Kf2
- 2.Qd4#
- 1...Kd2!
- 1...Kf2
- 1.Qxd3+?
- 1...Kf2
- 2.Qd4#
- 1...Kxd3!
- 1...Kf2
- 1.Qc5+?
- 1...Kd2
- 2.Qc1#
- 1...Ke4
- 2.Qd4#
- 1...bxc5!
- 1...Kd2
- 1.g5?
- 1...Kf2
- 2.Qd4#
- 1...e1Q
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Qxe1#
- 1...e1R
- 2.Qxe1#
- 1...f2
- 2.Rg3#
- 1...Ke4!
- 1...Kf2
- 1.Ka3?
- Keys
- 1.Qb2!
- 1...Kf2
- 2.Qd4#
- 1...Ke4
- 2.Qd4#
- 1...d2
- 2.Qd4#
- 1...e1Q
- 2.Rxe1#
- 1...e1S
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...f2
- 2.Rg3#
- 1...Kf2
- 1.Qb2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(c);N_SPINP(b),S_FLIGHT::QAB(C)
- K(c);N_SPINP(b),P-FLIGHT,P_SPINP(d)::QAR1(C)
- P(a);OGATEB::QAR2(C),XQ(a)
- P(a);OGATEB::QAR2(C),XS(a)
- P(a);OGATEB::QAR2(C),XB(a)
- P(a);OGATEB::QAR2(C),XR(a)
- P(d);OGATEB,SBLOCK::R(A)
- Tries
- Try
- K(D);P-FLIGHT
- Vars
- K(c);N_SPINP(b),S_FLIGHT::QAB(C)
- K(c);N_SPINP(b),P-FLIGHT,P_SPINP(d)::QAR1(C)
- P(a);OGATEB::QAR2(C),XQ(a)
- P(a);OGATEB::QAR2(C),XS(a)
- P(a);OGATEB::QAR2(C),XB(a)
- P(a);OGATEB::QAR2(C),XR(a)
- P(d);OGATEB,SBLOCK::R(A)
- Refutation
- P(e);
- Try
- K(D);S_FLIGHT
- Vars
- K(c);N_SPINP(b),S_FLIGHT::QAB(C)
- K(c);N_SPINP(b),P-FLIGHT,P_SPINP(d)::QAR1(C)
- P(a);OGATEB::QAR2(C),XQ(a)
- P(a);OGATEB::QAR2(C),XS(a)
- P(a);OGATEB::QAR2(C),XB(a)
- P(a);OGATEB::QAR2(C),XR(a)
- P(d);OGATEB,SBLOCK::R(A)
- Refutation
- P(e);CHECK
- Try
- R(A);
- Vars
- K(c);N_SPINP(b),P-FLIGHT::QAR1(C)
- P(d);OGATEB,SBLOCK::R(A)
- Refutation
- P(d);XR(A)
- Try
- R(A);
- Vars
- K(c);N_SPINP(b),P-FLIGHT,P_SPINP(d)::QAR1(C)
- P(a);OGATEB::QAR2(C),XQ(a)
- P(a);OGATEB::QAR2(C),XS(a)
- P(a);OGATEB::QAR2(C),XB(a)
- P(a);OGATEB::QAR2(C),XR(a)
- Refutation
- K(c);N_SPINP(b),S_FLIGHT
- Try
- Q(C);N_PINP(b)
- Vars
- K(c);S_FLIGHT::QAB1(C)
- K(c);S_FLIGHT::QAB(C)
- K(c);P-FLIGHT,P_SPINP(d)::QAR1(C)
- P(a);OGATEB::QAR2(C),XQ(a)
- P(a);OGATEB::QAR2(C),XS(a)
- P(a);OGATEB::QAR2(C),XB(a)
- P(a);OGATEB::QAR2(C),XR(a)
- P(b);::QAB1(C)
- Refutation
- P(d);
- Try
- Q(C);N_PINP(b)
- Vars
- K(c);S_FLIGHT::QAB(C)
- P(a);OGATEB::QAR2(C),XQ(a)
- P(a);OGATEB::QAR2(C),XS(a)
- P(a);OGATEB::QAR2(C),XB(a)
- P(a);OGATEB::QAR2(C),XR(a)
- P(b);::QAB1(C)
- Refutation
- P(e);XQ(C)
- Try
- Q(C);CHECK,N_PINP(b)
- Vars
- K(c);S_FLIGHT::QAB(C)
- Refutation
- K(c);S_FLIGHT
- Try
- Q(C);CHECK,XP(b)
- Vars
- K(c);S_FLIGHT::QAB(C)
- Refutation
- K(c);P-FLIGHT,XQ(C)
- Try
- Q(C);CHECK,N_PINP(b)
- Vars
- K(c);S_FLIGHT::QAB1(C)
- K(c);P-FLIGHT,P_SPINP(d)::QAR1(C)
- Refutation
- P(f);XQ(C)
- Try
- P(E);
- Vars
- K(c);N_SPINP(b),S_FLIGHT::QAB(C)
- P(a);OGATEB::QAR2(C),XQ(a)
- P(a);OGATEB::QAR2(C),XS(a)
- P(a);OGATEB::QAR2(C),XB(a)
- P(a);OGATEB::QAR2(C),XR(a)
- P(d);OGATEB,SBLOCK::R(A)
- Refutation
- K(c);N_SPINP(b),P-FLIGHT,P_SPINP(d)
- Try
- Actual
- Q(C);N_PINP(b)
- Vars
- K(c);P_SPINP(a),S_FLIGHT::QAB(C)
- K(c);P-FLIGHT,P_SPINP(d)::QAR1(C)
- P(b);::QAB1(C)
- P(a);OGATEB::R(A),XQ(a)
- P(a);OGATEB::R(A),XS(a)
- P(a);OGATEB::R(A),XB(a)
- P(a);OGATEB::R(A),XR(a)
- P(d);OGATEB,SBLOCK::R(A)
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).