MESON Chess Problem Database
Problem Display
PID: 21509 (2RB4/4p3/2p1p3/1rk1P2p/Bp1p1N2/1K1Q3q/2P5/2R5 w - - 0 1)
Guidelli, Giorgio
3rd Prize, Good Companions (January), 1919
#2
9 + 9
| 3132 | The Good Companion Two-Mover | 1922 |
| 133 | The Problemist Supplement | 2009 |
| 56 | The Problemist | 2012 |
SOLUTION
- SOUND
- Sets
- 1...Qg2
- 2.Qc4#
- 2.Qxb5#
- 1...Qg4
- 2.Qc4#
- 2.Qxb5#
- 1...Qf5
- 2.Qc4#
- 2.Qxb5#
- 1...Qh1
- 2.Qc4#
- 2.Qxb5#
- 1...Qh2
- 2.Qc4#
- 2.Qxb5#
- 1...Qxd3+
- 2.cxd3#
- 1...Qh4
- 2.Qc4#
- 2.Qxb5#
- 1...Ra5
- 2.Rxc6#
- 1...Rb6
- 2.Bxe7#
- 1...Rb7
- 2.Rxc6#
- 1...Rb8
- 2.Rxc6#
- 1...Qg2
- Tries
- 1.Kb2?
- threat
- 2.Qxb5#
- 1...Qxd3
- 2.cxd3#
- 1...Ra5
- 2.Rxc6#
- 1...Rb6
- 2.Bxe7#
- 1...Rb7
- 2.Rxc6#
- 1...Rb8
- 2.Rxc6#
- 1...Qf1!
- threat
- 1.Sxh3?
- threat
- 2.Qc4#
- 2.Qxb5#
- 1...Ra5
- 2.Qc4#
- 1...Rb6
- 2.Qc4#
- 1...Rb7
- 2.Qc4#
- 1...Rb8
- 2.Qc4#
- 1...Kd5!
- threat
- 1.Qxh3?
- 1...d3
- 2.Qe3#
- 1...Ra5
- 2.Rxc6#
- 1...Rb6
- 2.Bxe7#
- 1...Rb7
- 2.Rxc6#
- 1...Rb8
- 2.Rxc6#
- 1...h4!
- 1...d3
- 1.c3?
- threat
- 2.Qc4#
- 2.Qxb5#
- 2.Qxd4#
- 2.cxb4#
- 2.cxd4#
- 1...bxc3+
- 2.Qxb5#
- 1...dxc3
- 2.Qc4#
- 1...Qf1
- 2.Qxd4#
- 2.cxb4#
- 2.cxd4#
- 1...Qe3
- 2.Qc4#
- 2.Qxb5#
- 2.cxb4#
- 2.cxd4#
- 1...Ra5
- 2.Rxc6#
- 2.Qc4#
- 2.Qxd4#
- 2.cxb4#
- 2.cxd4#
- 1...Rb6
- 2.Bxe7#
- 2.Qc4#
- 2.Qxd4#
- 2.cxb4#
- 2.cxd4#
- 1...Rb7
- 2.Rxc6#
- 2.Qc4#
- 2.Qxd4#
- 2.cxb4#
- 2.cxd4#
- 1...Rb8
- 2.Rxc6#
- 2.Qc4#
- 2.Qxd4#
- 2.cxb4#
- 2.cxd4#
- 1...Qxd3!
- threat
- 1.Kb2?
- Keys
- 1.c4!
- threat
- 2.cxb5#
- 1...Qxd3+
- 2.Sxd3#
- 1...bxc4 ep+
- 2.Qxb5#
- 1...dxc4 ep
- 2.Qc4#
- 1...Qf1
- 2.Sxe6#
- 1...Qg2
- 2.Sxe6#
- 1...Qh1
- 2.Sxe6#
- 1...Qh2
- 2.Sxe6#
- 1...Qe3
- 2.Sxe6#
- 1...Ra5
- 2.Rxc6#
- 1...Rb6
- 2.Bxe7#
- 1...Rb7
- 2.Rxc6#
- 1...Rb8
- 2.Rxc6#
- threat
- 1.c4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- Q(a);CHECK,OGATE,XQ(D)::R(A)+P(B),XQ(a)
- R(d);::R1(H),XP(g)
- R(d);SBLOCK::B(I),XP(i)
- Tries
- Try
- K(C);N_SPINQ(D),P-FLIGHT
- Threat
- QAR1(D),XR(d)
- Vars
- Q(a);OGATE,XQ(D)::R(A)+P(B),XQ(a)
- R(d);::R1(H),XP(g)
- R(d);SBLOCK::B(I),XP(i)
- Refutation
- Q(a);
- Try
- S(F);N_SPINQ(D),XQ(a)
- Threat
- DUALS(2)
- Vars
- R(d);::QAR1(D)
- Refutation
- K(e);N_SPINP(g),P-FLIGHT,P_SPINP(c)
- Try
- Q(D);N_SPINQ(D),XQ(a)
- Vars
- P(c);OGATEB::QAB(D)
- R(d);::R1(H),XP(g)
- R(d);SBLOCK::B(I),XP(i)
- Refutation
- P(f);
- Try
- P(B);N_SPINQ(D)
- Threat
- DUALS(5)
- Vars
- P(b);CHECK,N_SPINP(g),P_SPINP(b),XP(B)::QAR1(D),XR(d)
- P(c);N_SPINP(g),P_SPINP(c),XP(B)::QAR1(D)
- Refutation
- Q(a);P_PINP(B),XQ(D)
- Try
- Actual
- P(B);
- Threat
- R(A)+P(B),XR(d)
- Vars
- Q(a);CHECK,XQ(D)::S(F),XQ(a)
- P(b);CHECK,EP,N_PINQ(D),N_SPINP(g),P_SPINP(b),XP(B)::QAR1(D),XR(d)
- P(c);EP,N_PINQ(D),N_SPINP(g),P_SPINP(c),XP(B)::QAR1(D)
- Q(a);N_GUARD,N_PINQ(D)::S(F),XP(h)
- Q(a);N_GUARD::S(F),XP(h)
- R(d);::R1(H),XP(g)
- R(d);SBLOCK::B(I),XP(i)
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