MESON Chess Problem Database
Problem Display
PID: 143477 (k7/5pb1/N3p3/PP6/2K5/3p4/8/3Qn3 w - - 0 1)
Thorne, Herbert William
American Chess Problemist, 1949
#4
5 + 6
SOLUTION
- SOUND
- Keys
- 1.Qh5!
- threat
- 2.Qc5
- threat
- 3.Qc8+
- 3...Ka7
- 4.Qb8#
- 4.b6#
- 3...Ka7
- 3.Qc8+
- 2...Kb7
- 3.Qb6+
- 3...Ka8
- 4.Sc7#
- 4.Qb8#
- 3...Kc8
- 4.Qc7#
- 3...Ka8
- 3.Qc7+
- 3...Ka8
- 4.Qb8#
- 3...Ka8
- 3.Qb6+
- 2...Bd4
- 3.Qf8+
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- 3...Ka7
- 3.Qc8+
- 3...Ka7
- 4.Qb8#
- 3...Ka7
- 3.Qf8+
- 2...Be5
- 3.Qc8+
- 3...Ka7
- 4.b6#
- 3...Bb8
- 4.Qxb8#
- 3...Ka7
- 3.Qxe5
- threat
- 4.Qb8#
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- threat
- 3.Qc8+
- threat
- 2.b6
- threat
- 3.Qh1+
- 3...Sg2
- 4.Qxg2#
- 3...Sf3
- 4.Qxf3#
- 3...Sg2
- 3.Qxf7
- threat
- 4.Qa7#
- threat
- 3.Qh1+
- 2...Kb7
- 3.Qxf7+
- 3...Kxa6
- 4.Qa7#
- 3...Kc6
- 4.Qc7#
- 3...Ka8
- 4.Qa7#
- 3...Kc8
- 4.Qc7#
- 3...Kxa6
- 3.Qxf7+
- 2...e5
- 3.Qxf7
- threat
- 4.Qd5#
- 4.Qa7#
- threat
- 3.Qxf7
- threat
- 2.Qc5
- 1...Ka7
- 2.Qxf7+
- 2...Ka8
- 3.Qe8+
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- 3...Ka7
- 3.Sc5
- threat
- 4.Qb7#
- 3...Kb8
- 4.Qb7#
- threat
- 3.b6
- threat
- 4.Qa7#
- threat
- 3.Qe8+
- 2...Ka8
- 2.Qc5+
- 2...Kb7
- 3.Qb6+
- 3...Ka8
- 4.Sc7#
- 4.Qb8#
- 3...Kc8
- 4.Qc7#
- 3...Ka8
- 3.Qc7+
- 3...Ka8
- 4.Qb8#
- 3...Ka8
- 3.Qb6+
- 2...Ka8
- 3.Qc8+
- 3...Ka7
- 4.Qb8#
- 4.b6#
- 3...Ka7
- 3.Qc8+
- 2...Kb7
- 2.b6+
- 2...Kxa6
- 3.Qxf7
- threat
- 4.Qa7#
- 3...Kxa5
- 4.Qa7#
- threat
- 3.Qxf7
- 2...Kb7
- 3.Qxf7+
- 3...Kxa6
- 4.Qa7#
- 3...Kc6
- 4.Qc7#
- 3...Ka8
- 4.Qa7#
- 3...Kc8
- 4.Qc7#
- 3...Kxa6
- 3.Qxf7+
- 2...Ka8
- 3.Qh1+
- 3...Sg2
- 4.Qxg2#
- 3...Sf3
- 4.Qxf3#
- 3...Sg2
- 3.Qxf7
- threat
- 4.Qa7#
- threat
- 3.Qh1+
- 2...Kxa6
- 2.Qxf7+
- 1...Kb7
- 2.Qxf7+
- 2...Ka8
- 3.Qe8+
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- 3...Ka7
- 3.Sc5
- threat
- 4.Qb7#
- 3...Kb8
- 4.Qb7#
- threat
- 3.b6
- threat
- 4.Qa7#
- threat
- 3.Qe8+
- 2...Ka8
- 2.Qc5
- threat
- 3.Qb6+
- 3...Ka8
- 4.Sc7#
- 4.Qb8#
- 3...Kc8
- 4.Qc7#
- 3...Ka8
- 3.Qc7+
- 3...Ka8
- 4.Qb8#
- 3...Ka8
- 3.Qb6+
- 2...Ka8
- 3.Qc8+
- 3...Ka7
- 4.Qb8#
- 4.b6#
- 3...Ka7
- 3.Qc8+
- 2...Be5
- 3.Qxe5
- threat
- 4.Qb8#
- 3...Ka7
- 4.Qb8#
- 3...Ka8
- 4.Qb8#
- 3...Kc8
- 4.Qc7#
- threat
- 3.Qxe5
- threat
- 2.Qxf7+
- 1...Bd4
- 2.Qh2
- threat
- 3.Qb8#
- 2...Be5
- 3.Qxe5
- threat
- 4.Qb8#
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- threat
- 3.Qxe5
- 2...Ba7
- 3.Qh1+
- 3...Sg2
- 4.Qxg2#
- 3...Sf3
- 4.Qxf3#
- 3...Sg2
- 3.Qd6
- threat
- 4.Qc6#
- 3...Kb7
- 4.Qc6#
- 3...Bg1
- 4.Qb8#
- 3...Bf2
- 4.Qb8#
- 3...Be3
- 4.Qb8#
- 3...Bd4
- 4.Qb8#
- 3...Bc5
- 4.Qb8#
- 3...Bb6
- 4.Qb8#
- 3...Bb8
- 4.Qxb8#
- threat
- 3.Qc7
- threat
- 4.Qc6#
- 3...Bg1
- 4.Qb8#
- 3...Bf2
- 4.Qb8#
- 3...Be3
- 4.Qb8#
- 3...Bd4
- 4.Qb8#
- 3...Bc5
- 4.Qb8#
- 3...Bb6
- 4.Qb8#
- 3...Bb8
- 4.Qxb8#
- threat
- 3.Qh1+
- 2...e5
- 3.Qh8+
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- 3...Ka7
- 3.Qh8+
- threat
- 2.Qh2
- 1...Bf6
- 2.Qc5
- threat
- 3.Qc8+
- 3...Ka7
- 4.Qb8#
- 4.b6#
- 3...Ka7
- 3.Qc8+
- 2...Kb7
- 3.Qb6+
- 3...Ka8
- 4.Sc7#
- 4.Qb8#
- 3...Kc8
- 4.Qc7#
- 3...Ka8
- 3.Qc7+
- 3...Ka8
- 4.Qb8#
- 3...Ka8
- 3.Qb6+
- 2...Bd4
- 3.Qf8+
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- 3...Ka7
- 3.Qc8+
- 3...Ka7
- 4.Qb8#
- 3...Ka7
- 3.Qf8+
- 2...Be5
- 3.Qc8+
- 3...Ka7
- 4.b6#
- 3...Bb8
- 4.Qxb8#
- 3...Ka7
- 3.Qxe5
- threat
- 4.Qb8#
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- threat
- 3.Qc8+
- 2...Bd8
- 3.Qc8+
- 3...Ka7
- 4.Qb8#
- 3...Ka7
- 3.Qc8+
- threat
- 2.Qc5
- 1...Bf8
- 2.Qe5
- threat
- 3.Qb8#
- 2...Bd6
- 3.Qxd6
- threat
- 4.Qb8#
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- threat
- 3.Qxd6
- threat
- 2.Qh8
- threat
- 3.Qxf8+
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- 3...Ka7
- 3.Qxf8+
- 2...Ka7
- 3.Qxf8
- threat
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- threat
- 3.Qxf8
- 2...Kb7
- 3.Qxf8
- threat
- 4.Qb8#
- 3...Ka7
- 4.Qb8#
- threat
- 3.Qxf8
- threat
- 2.Qe5
- 1...Sc2
- 2.Qf3+
- 2...Ka7
- 3.b6+
- 3...Kxa6
- 4.Qa8#
- 3...Kxa6
- 3.b6+
- 2...Ka7
- 2.Qh1+
- 2...Ka7
- 3.b6+
- 3...Kxa6
- 4.Qa8#
- 3...Kxa6
- 3.b6+
- 2...Ka7
- 2.Qf3+
- 1...Sg2
- 2.Qf3+
- 2...Ka7
- 3.b6+
- 3...Kxa6
- 4.Qa8#
- 3...Kxa6
- 3.b6+
- 2...Ka7
- 2.Qf3+
- 1...Sf3
- 2.Qxf3+
- 2...Ka7
- 3.b6+
- 3...Kxa6
- 4.Qa8#
- 3...Kxa6
- 3.Sc5
- threat
- 4.Qb7#
- 3...Kb8
- 4.Qb7#
- threat
- 3.b6+
- 2...Ka7
- 2.Qxf3+
- 1...e5
- 2.Qxf7
- threat
- 3.Qe8+
- 3...Ka7
- 4.Qb8#
- 3...Kb7
- 4.Qb8#
- 3...Ka7
- 3.Sc5
- threat
- 4.Qb7#
- 3...Kb8
- 4.Qb7#
- threat
- 3.Qc7
- threat
- 4.Qb8#
- threat
- 3.b6
- threat
- 4.Qd5#
- 4.Qa7#
- threat
- 3.Qe8+
- threat
- 2.b6
- threat
- 3.Qxf7
- threat
- 4.Qd5#
- 4.Qa7#
- threat
- 3.Qxf7
- 2...Kb7
- 3.Qxf7+
- 3...Kxa6
- 4.Qa7#
- 3...Kc6
- 4.Qd5#
- 4.Qc7#
- 3...Ka8
- 4.Qd5#
- 4.Qa7#
- 3...Kc8
- 4.Qc7#
- 3...Kxa6
- 3.Qxf7+
- 2...Sc2
- 3.Qf3+
- 3...e4
- 4.Qxe4#
- 3...e4
- 3.Qh1+
- 3...e4
- 4.Qxe4#
- 3...e4
- 3.Qf3+
- 2...Sg2
- 3.Qf3+
- 3...e4
- 4.Qxe4#
- 3...e4
- 3.Qf3+
- 2...Sf3
- 3.Qxf3+
- 3...e4
- 4.Qxe4#
- 3...e4
- 3.Qxf3+
- 2...f5
- 3.Qe8+
- 3...Kb7
- 4.Sc5#
- 3...Kb7
- 3.Qf7
- threat
- 4.Qd5#
- 4.Qa7#
- threat
- 3.Qe8+
- 2...f6
- 3.Qe8+
- 3...Kb7
- 4.Sc5#
- 3...Kb7
- 3.Sc5
- threat
- 4.Qe8#
- 3...Kb8
- 4.Qe8#
- threat
- 3.Qf7
- threat
- 4.Qd5#
- 4.Qa7#
- threat
- 3.Qe8+
- threat
- 2.Qxf7
- threat
- 1.Qh5!
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