MESON Chess Problem Database
Problem Display
PID: 90280 (8/1p6/1P3Q1p/2kp2pP/P1q1B1K1/P7/8/2R2R2 w - - 0 1)
Meurs, Abraham
Die Schwalbe, 1933
#2
9 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxc1
- 2.Rxc1#
- 1...Qc2
- 2.Rxc2#
- 1...Qc3
- 2.Rxc3#
- 1...dxe4
- 2.Rf5#
- 1...d4
- 2.Rf5#
- 1...Qxc1
- Tries
- 1.Kg3?
- 1...Qc3+
- 2.Rxc3#
- 1...Qxc1
- 2.Rxc1#
- 1...dxe4
- 2.Rf5#
- 1...Qc2
- 2.Rxc2#
- 1...d4
- 2.Rf5#
- 1...g4!
- 1...Qc3+
- 1.Kh3?
- 1...Qc3+
- 2.Rxc3#
- 1...Qxc1
- 2.Rxc1#
- 1...dxe4
- 2.Rf5#
- 1...Qc2
- 2.Rxc2#
- 1...d4
- 2.Rf5#
- 1...g4+!
- 1...Qc3+
- 1.Rc2?
- 1...dxe4
- 2.Rf5#
- 1...Qc3
- 2.Rxc3#
- 1...d4
- 2.Rf5#
- 1...Qxc2!
- 1...dxe4
- 1.Rc3?
- 1...dxe4
- 2.Rf5#
- 1...d4
- 2.Rf5#
- 1...Qxc3!
- 1...dxe4
- 1.Rxc4+?
- 1...dxc4
- 2.Rf5#
- 1...Kxc4!
- 1...dxc4
- 1.Rf2?
- 1...dxe4
- 2.Rf5#
- 1...Qc2
- 2.Rcxc2#
- 2.Rfxc2#
- 1...Qc3
- 2.Rxc3#
- 1...d4
- 2.Rf5#
- 1...Qxc1!
- 1...dxe4
- 1.Rf3?
- 1...dxe4
- 2.Rf5#
- 1...Qc2
- 2.Rxc2#
- 1...Qc3
- 2.Rcxc3#
- 2.Rfxc3#
- 1...d4
- 2.Rf5#
- 1...Qxc1!
- 1...dxe4
- 1.Rf5?
- threat
- 2.Rxd5#
- 1...Qc2
- 2.Rxc2#
- 1...Qc3
- 2.Rxc3#
- 1...Qxc1!
- threat
- 1.Kg3?
- Keys
- 1.Rfd1!
- threat
- 2.Rxd5#
- 1...Qxc1
- 2.Rxc1#
- 1...dxe4
- 2.Qd6#
- 1...Qc2
- 2.Rxc2#
- 1...Qc3
- 2.Rxc3#
- 1...d4
- 2.Qxd4#
- threat
- 1.Rfd1!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(a);N_PINB(E),N_SPINQ(a),XR(A)::R(B),XQ(a)
- Q(a);N_PINB(E),OGATEB::R(A),XQ(a)
- P(c);XB(E)::R(B)
- P(c);N_PINB(E)::R(B)
- Tries
- Try
- K(F);N_SPINB(E),P-FLIGHT
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);N_SPINQ(a),OGATE,XR(A)::R(B),XQ(a)
- P(c);OGATEB,XB(E)::R(B)
- Q(a);OGATEB::R(A),XQ(a)
- P(c);OGATEB::R(B)
- Refutation
- P(d);
- Try
- K(F);N_SPINB(E),S_FLIGHT
- Vars
- Q(a);CHECK,OGATEB::R(A),XQ(a)
- Q(a);N_SPINQ(a),OGATE,XR(A)::R(B),XQ(a)
- P(c);OGATEB,XB(E)::R(B)
- Q(a);OGATEB::R(A),XQ(a)
- P(c);OGATEB::R(B)
- Refutation
- P(d);CHECK
- Try
- R(A);
- Vars
- P(c);XB(E)::R(B)
- Q(a);N_PINB(E),OGATEB::R(A),XQ(a)
- P(c);N_PINB(E)::R(B)
- Refutation
- Q(a);N_PINB(E),N_SPINQ(a),XR(A)
- Try
- R(A);
- Vars
- P(c);XB(E)::R(B)
- P(c);N_PINB(E)::R(B)
- Refutation
- Q(a);N_PINB(E),N_SPINQ(a),XR(A)
- Try
- R(A);CHECK,N_SPINB(E),XQ(a)
- Vars
- P(c);SBLOCK,XR(A)::R(B)
- Refutation
- K(b);P-FLIGHT,XR(A)
- Try
- R(B);
- Vars
- P(c);XB(E)::R(B)
- Q(a);N_PINB(E),OGATEB::R(A),XQ(a)
- P(c);N_PINB(E)::R(B)
- Refutation
- Q(a);N_PINB(E),N_SPINQ(a),XR(A)
- Try
- R(B);
- Vars
- P(c);XB(E)::R(B)
- Q(a);N_PINB(E),OGATEB::R(A),XQ(a)
- P(c);N_PINB(E)::R(B)
- Refutation
- Q(a);N_PINB(E),N_SPINQ(a),XR(A)
- Try
- R(B);P_PINP(c)
- Threat
- R1(B),XP(c)
- Vars
- Q(a);N_PINB(E),OGATEB::R(A),XQ(a)
- Refutation
- Q(a);N_PINB(E),N_SPINQ(a),XR(A)
- Try
- Actual
- R(B);
- Threat
- R1(B),XP(c)
- Vars
- Q(a);N_PINB(E),N_SPINQ(a),XR(A)::R(B),XQ(a)
- P(c);XB(E)::QAB1(I)
- Q(a);N_PINB(E),OGATEB::R(A),XQ(a)
- P(c);N_PINB(E)::QAB1(I),XP(c)
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).