MESON Chess Problem Database
Problem Display
PID: 287276 (5Q2/3prn1B/b5nB/6bp/R3p1Pq/3k2pP/Np4R1/3NK3 w - - 0 1)
Jordan, Gijsbertus
Die Schwalbe, 1935
#2
10 + 12
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Qa3#
- 1...Re6
- 2.Qa3#
- 1...Re8
- 2.Qa3#
- 1...Bd2+
- 2.Rxd2#
- 1...Be3
- 2.Sxb2#
- 1...Bf6
- 2.Rd2#
- 1...Sf4
- 2.Rd2#
- 1...Sge5
- 2.Bxe4#
- 1...Sfe5
- 2.Qf1#
- 1...Sd6
- 2.Qf1#
- 1...Sxh6
- 2.Qf1#
- 1...Sd8
- 2.Qf1#
- 1...Sh8
- 2.Qf1#
- 1...e3
- 2.Sxb2#
- 1...Re5
- Tries
- 1.Bxg5?
- threat
- 2.Sxb2#
- 2.Rd2#
- 1...Sxg5
- 2.Rd2#
- 2.Qf1#
- 1...Bc4
- 2.Rd2#
- 1...b1Q
- 2.Rd2#
- 1...b1S
- 2.Sb2#
- 2.Sc1#
- 1...b1B
- 2.Sb2#
- 2.Sc1#
- 2.Rd2#
- 1...b1R
- 2.Rd2#
- 1...Sf4
- 2.Rd2#
- 1...e3
- 2.Sxb2#
- 1...Qxg5!
- threat
- 1.Qxe7?
- threat
- 2.Qa3#
- 2.Qxe4#
- 1...Bd2+
- 2.Rxd2#
- 1...Qxg4
- 2.Qa3#
- 1...Bxe7
- 2.Sxb2#
- 2.Rd2#
- 1...Sxe7
- 2.Bxe4#
- 1...b1Q
- 2.Qxe4#
- 1...b1S
- 2.Qxe4#
- 1...b1R
- 2.Qxe4#
- 1...Bf6
- 2.Rd2#
- 2.Qxe4#
- 1...Bb7
- 2.Qa3#
- 1...Sge5
- 2.Bxe4#
- 2.Qa3#
- 1...Sfe5
- 2.Qa3#
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...e3
- 2.Sxb2#
- 2.Bxg6#
- 2.Qa3#
- 2.Qe4#
- 1...d5
- 2.Qa3#
- 1...d6
- 2.Qxe4#
- 1...Bc4!
- threat
- 1.Qxf7?
- threat
- 2.Qb3#
- 2.Qd5#
- 2.Qf1#
- 1...Bd2+
- 2.Rxd2#
- 1...Qxg4
- 2.Qb3#
- 2.Qd5#
- 1...Bc4
- 2.Qxc4#
- 1...b1Q
- 2.Qd5#
- 2.Qf1#
- 1...b1S
- 2.Qd5#
- 2.Qf1#
- 1...b1R
- 2.Qd5#
- 2.Qf1#
- 1...Re5
- 2.Qb3#
- 2.Qf1#
- 1...Re6
- 2.Qf1#
- 1...Be3
- 2.Sxb2#
- 2.Qb3#
- 2.Qf1#
- 1...Bf4
- 2.Qb3#
- 2.Qd5#
- 1...Bf6
- 2.Rd2#
- 1...Bb7
- 2.Qb3#
- 2.Qc4#
- 2.Qf1#
- 1...Sf4
- 2.Rd2#
- 2.Qb3#
- 1...e3
- 2.Sxb2#
- 2.Qb3#
- 2.Qd5#
- 1...d5
- 2.Qxd5#
- 2.Qf1#
- 1...Rxf7!
- threat
- 1.Qc8?
- threat
- 2.Qxa6#
- 2.Qc2#
- 2.Qc3#
- 1...Bd2+
- 2.Rxd2#
- 1...Bc4
- 2.Qxc4#
- 1...b1Q
- 2.Qc3#
- 1...b1S
- 2.Qxa6#
- 2.Qc2#
- 1...b1B
- 2.Qxa6#
- 2.Qc3#
- 1...b1R
- 2.Qc2#
- 2.Qc3#
- 1...Re5
- 2.Qc2#
- 2.Qc3#
- 1...Re6
- 2.Qc2#
- 2.Qc3#
- 1...Bf6
- 2.Rd2#
- 2.Qxa6#
- 2.Qc2#
- 1...Bb5
- 2.Qc2#
- 2.Qc3#
- 1...Bb7
- 2.Qc2#
- 2.Qc3#
- 2.Qc4#
- 1...Sge5
- 2.Bxe4#
- 2.Qc2#
- 2.Qc3#
- 1...Sfe5
- 2.Qc2#
- 2.Qc3#
- 1...Sd6
- 2.Qc2#
- 2.Qc3#
- 1...Bxc8!
- threat
- 1.Bxg5?
- Keys
- 1.Bg7!
- threat
- 2.Rd4#
- 1...Bd2+
- 2.Rxd2#
- 1...Re5
- 2.Qa3#
- 1...Be3
- 2.Sxb2#
- 1...Bf6
- 2.Rd2#
- 1...Bc4
- 2.Sb4#
- 1...Sge5
- 2.Bxe4#
- 1...Sfe5
- 2.Qf1#
- threat
- 1.Bg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- R(k);OGATE::QAR(J)
- B(f);CHECK,N_GUARD::R1(D),XB(f)
- B(f);::S(A),XP(a)
- B(f);N_GUARD::R1(D)
- S(i);P_SPINP(d),S_CUTB(f)::R1(D)
- S(i);OGATE,P_SPINP(d)::B(I),XP(d)
- S(l);OGATE::QAB(J)
- S(l);OGATE,XB(H)::QAB(J)
- P(d);P_SPINS(i),SBLOCK::S(A),XP(a)
- Tries
- Try
- B(H);XB(f)
- Threat
- DUALS(2)
- Vars
- B(h);::R1(D)
- P(a);P_PINS(A)::R1(D)
- S(i);P_SPINP(d)::R1(D)
- P(d);P_SPINS(i)::S(A),XP(a)
- Refutation
- Q(e);XB(H)
- Try
- Q(J);XR(k)
- Threat
- DUALS(2)
- Vars
- B(f);CHECK,N_GUARD::R1(D),XB(f)
- Q(e);XP(G)::QAR(J)
- S(i);OGATE,P_SPINP(d),XQ(J)::B(I),XP(d)
- P(a);P_PINS(A)::QAB1(J),XP(d)
- P(a);::QAB1(J),XP(d)
- B(h);::QAR(J)
- S(l);N_GUARD::QAR(J),XS(l)
- P(j);::QAR(J)
- P(j);::QAB1(J),XP(d)
- Refutation
- B(h);
- Try
- Q(J);XS(l)
- Threat
- DUALS(3)
- Vars
- B(f);CHECK,N_GUARD::R1(D),XB(f)
- B(h);N_GUARD::QAB1(J),XB(h)
- R(k);::QAB(J)
- B(f);N_GUARD::R1(D)
- Refutation
- R(k);XQ(J)
- Try
- Q(J);
- Threat
- DUALS(3)
- Vars
- B(f);CHECK,N_GUARD::R1(D),XB(f)
- B(h);N_GUARD::QAB1(J),XB(h)
- P(a);P_PINS(A)::QAR1(J)
- Refutation
- B(h);XQ(J)
- Try
- Actual
- B(H);
- Threat
- R1(F)
- Vars
- B(f);CHECK,N_GUARD::R1(D),XB(f)
- R(k);OGATE::QAR(J)
- B(f);SBLOCK::S(A),XP(a)
- B(f);N_GUARD::R1(D)
- B(h);SBLOCK::S(C)
- S(i);OGATE,P_SPINP(d)::B(I),XP(d)
- S(l);OGATE::QAB(J)
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).