MESON Chess Problem Database

Problem Display
PID: 113107 (4K3/8/b3B3/pP1Rn3/p1k5/8/PQ1B2p1/2r1r1q1 w - - 0 1)

Savournin, Jacques

2nd HM., Olympic Ty., 1964

4K3/8/b3B3/pP1Rn3/p1k5/8/PQ1B2p1/2r1r1q1

#2

7 + 9

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Qd4#
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qc5
      • 2.Rd4#
    • 1...Qf1
      • 2.Qd4#
    • 1...Qh1
      • 2.Qd4#
    • 1...Ra1
      • 2.Qc3#
      • 2.Qc2#
    • 1...Rb1
      • 2.Qc3#
      • 2.Qc2#
    • 1...Rcd1
      • 2.Qc3#
      • 2.Qc2#
    • 1...Rc2
      • 2.Qxc2#
    • 1...Rc3
      • 2.Qxc3#
    • 1...Re3
      • 2.Qd4#
    • 1...Bxb5+
      • 2.Qxb5#
    • 1...Sd3
      • 2.Re5#
    • 1...a3
      • 2.Qb3#
  • Tries
    • 1.Be3?
      • threat
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rd8#
        • 2.Qd4#
      • 1...Bxb5+
        • 2.Rd7#
      • 1...Rxe3
        • 2.Qd4#
      • 1...Rcd1
        • 2.Rxd1#
        • 2.Rd2#
      • 1...Rc3
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rd8#
      • 1...Red1
        • 2.Rxd1#
        • 2.Rd2#
      • 1...Bb7
        • 2.Qd4#
      • 1...Bc8
        • 2.Rd7#
        • 2.Qd4#
      • 1...Sd3
        • 2.Rc5#
        • 2.Re5#
        • 2.Rf5#
        • 2.Rg5#
        • 2.Rh5#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rd8#
        • 2.Qd4#
      • 1...Sf3
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rd8#
      • 1...Sc6
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd6#
        • 2.Rd7#
        • 2.Rd8#
      • 1...Sd7
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd6#
        • 2.Rxd7#
        • 2.Qd4#
      • 1...Qxe3!
    • 1.Bxa5?
      • threat
        • 2.Qb4#
      • 1...Bxb5+
        • 2.Qxb5#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qc5
        • 2.Rd4#
      • 1...Rb1
        • 2.Qc3#
        • 2.Qc2#
      • 1...Sd3
        • 2.Re5#
      • 1...Sc6!
    • 1.bxa6?
      • threat
        • 2.Qb5#
      • 1...Qc5
        • 2.Rd4#
      • 1...Rb1
        • 2.Qc3#
        • 2.Qc2#
      • 1...Qb6!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qxa4#
      • 1...Bxb5+
        • 2.Rd7#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qd4
        • 2.Rc5#
      • 1...Rb1
        • 2.Qc3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc6
        • 2.Qd3#

This anticipates 59799(2005)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD::QAR1(B)
    • Q(c);N_GUARD::QAR1(B),XQ(c)
    • Q(c);SBLOCK::B(F)+R(E),DCHECK
    • R(a);N_GUARD::QAR2(B),XR(a)
    • R(a);N_GUARD::QAR1(B),XR(a)
    • R(b);S_CUTQ(c)::QAR1(B)
    • B(i);CHECK,OGATE,XP(D)::QAB1(B),XB(i)
    • S(h);P_PINB(F),SBLOCK::B(F)+R(E)
    • P(e);N_GUARD::QAB1(B)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(6)
      • Vars
        • B(i);CHECK,XP(D)::B(F)+R(E)
        • R(b);XB(C)::QAR1(B)
        • B(i);::QAR1(B)
      • Refutation
        • Q(c);XB(C)
    • Try
      • B(C);XP(g)
      • Threat
        • QAR1(B)
      • Vars
        • B(i);CHECK,OGATE,XP(D)::QAB1(B),XB(i)
        • Q(c);N_GUARD::QAR1(B),XQ(c)
        • Q(c);SBLOCK::B(F)+R(E),DCHECK
        • S(h);P_PINB(F),SBLOCK::B(F)+R(E)
      • Refutation
        • S(h);P_PINB(F)
    • Try
      • P(D);XB(i)
      • Threat
        • QAB1(B)
      • Vars
        • Q(c);SBLOCK::B(F)+R(E),DCHECK
      • Refutation
        • Q(c);
  • Actual
    • Q(B);
    • Threat
      • QAR2(B),XP(e)
    • Vars
      • B(i);CHECK,SBLOCK,XP(D)::B(F)+R(E)
      • Q(c);N_GUARD::QAR1(B),XQ(c)
      • Q(c);SBLOCK::B(F)+R(E),DCHECK
      • R(a);N_GUARD::QAR1(B)
      • S(h);N_GUARD,P_PINB(F)::QAB1(B),XS(h)
      • S(h);N_GUARD,P_PINB(F)::QAB1(B)
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