MESON Chess Problem Database

Problem Display
PID: 18795 (7K/8/8/8/2R5/2N5/3kp3/1QbN2B1 w - - 0 1)

Stocchi, Ottavio

2nd Prize, L'Italia Scacchistica, 1958

7K/8/8/8/2R5/2N5/3kp3/1QbN2B1

#2

6 + 3

3147 Chess Problems: Introduction to an Art 1963
5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996
3310 2345 Chess Problems 1997
5407 Selected Stocchi (II) 2004
5626 European Junior Chess Solving Championship 2005

SOLUTION

  • SOUND
  • Sets
    • 1...e1Q
      • 2.Rd4#
    • 1...e1S
      • 2.Be3#
    • 1...e1B
      • 2.Be3#
      • 2.Rd4#
    • 1...e1R
      • 2.Rd4#
  • Tries
    • 1.Se3?
      • 1...Ke1
        • 2.Qxc1#
      • 1...e1Q
        • 2.Qc2#
      • 1...e1S
        • 2.Sf1#
      • 1...e1B
        • 2.Sf1#
        • 2.Qc2#
      • 1...e1R
        • 2.Qc2#
      • 1...Ba3
        • 2.Se4#
      • 1...Bb2!
    • 1.Se4+?
      • 1...Kxd1
        • 2.Rxc1#
        • 2.Qxc1#
      • 1...Ke1!
    • 1.Qa2+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kd3
        • 2.Rd4#
        • 2.Qxe2#
      • 1...Bb2!
    • 1.Qc2+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kxc2!
    • 1.Qd3+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kxd3!
    • 1.Qxc1+?
      • 1...Ke1
        • 2.Sb2#
        • 2.Sf2#
        • 2.Se3#
      • 1...Kd3
        • 2.Sb2#
        • 2.Rd4#
      • 1...Kxc1!
    • 1.Qb2+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kd3
        • 2.Rd4#
        • 2.Qxe2#
      • 1...Bxb2!
  • Keys
    • 1.Sf2!
      • 1...Ke1
        • 2.Qxc1#
      • 1...Ke3
        • 2.Qd3#
      • 1...e1Q
        • 2.Qd3#
      • 1...e1S
        • 2.Sfe4#
      • 1...e1B
        • 2.Sfe4#
        • 2.Qd3#
      • 1...e1R
        • 2.Qd3#
      • 1...Bb2
        • 2.Se4#
      • 1...Ba3
        • 2.Sfe4#

This is a version of 18794

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::R(E)
    • P(c);SBLOCK::B(C)
  • Tries
    • Try
      • S(B);
      • Vars
        • K(b);P_SPINB(a),S_FLIGHT::QAR2(A),XB(a)
        • P(c);SBLOCK::QAR1(A)
        • P(c);N_GUARD,SBLOCK::S(B)
        • B(a);::S(D)
      • Refutation
        • B(a);P_PINS(D)
    • Try
      • S(D);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • B(a);P_PINS(D),P_SPINB(a)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK,XB(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • B(a);P_PINS(D),XQ(A)
  • Actual
    • S(B);
    • Vars
      • K(b);P_SPINB(a),S_FLIGHT::QAR2(A),XB(a)
      • K(b);S_FLIGHT::QAR1(A)
      • P(c);SBLOCK::QAR1(A)
      • P(c);SBLOCK::S(B)
      • B(a);P_PINS(D)::S(B)
      • B(a);::S(B)
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