MESON Chess Problem Database

Problem Display
PID: 259453 (8/pP2B3/Rr1N1p1K/RPkN4/1p2P3/1p1qP3/3PQ3/1b6 w - - 0 1)

Cheylan, Yves

Comm., Probleemblad, 1982

8/pP2B3/Rr1N1p1K/RPkN4/1p2P3/1p1qP3/3PQ3/1b6

#2

12 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.d4#
    • 1...Qxe2
      • 2.d4#
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qxb5
      • 2.Qc4#
    • 1...Qxd2
      • 2.Qc4#
    • 1...Qxe3+
      • 2.Qxe3#
    • 1...Rc6
      • 2.Rxc6#
    • 1...Rxd6
      • 2.Rc6#
    • 1...Rxb7
      • 2.Rc6#
  • Tries
    • 1.Sxb6?
      • threat
        • 2.Sa4#
        • 2.Sd7#
      • 1...Qxe3+
        • 2.Qxe3#
      • 1...Qxe4
        • 2.Sxe4#
      • 1...axb6!
    • 1.Sc4+?
      • 1...Rd6
        • 2.Rc6#
      • 1...Kxc4!
    • 1.Sf5+?
      • 1...Rd6
        • 2.Rc6#
      • 1...Kc4!
    • 1.Sf7+?
      • 1...Rd6
        • 2.Rc6#
      • 1...Kc4!
    • 1.Sc8+?
      • 1...Rd6
        • 2.Rc6#
      • 1...Kc4!
    • 1.Se8+?
      • 1...Rd6
        • 2.Rc6#
      • 1...Kc4!
    • 1.Qxd3?
      • threat
        • 2.Qc4#
        • 2.Qd4#
      • 1...Rxd6
        • 2.Bxd6#
        • 2.Rc6#
        • 2.Qd4#
      • 1...Bxd3!
    • 1.b8S?
      • threat
        • 2.Sd7#
      • 1...Qxe3+
        • 2.Qxe3#
      • 1...Qxb5
        • 2.Sb7#
        • 2.Qc4#
        • 2.d4#
      • 1...Rxd6
        • 2.Rc6#
      • 1...Rxb8
        • 2.Rc6#
      • 1...Rb7
        • 2.Rc6#
      • 1...Qxe4!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Sd7#
      • 1...Qxe3+
        • 2.Qxe3#
      • 1...Qxe4
        • 2.Sdxe4#
      • 1...Qxb5
        • 2.Qc4#
      • 1...Qxd6
        • 2.d4#
      • 1...Rxd6
        • 2.Rc6#
      • 1...Rxb7
        • 2.Rc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(c);OGATE::P(A)
    • Q(c);OGATE,XQ(B)::P(A)
    • Q(c);OGATE::QAR1(B),XQ(c)
    • Q(c);OGATE,P_SPINQ(c),XP(F)::QAR1(B)
    • Q(c);OGATE,P_PINP(C),XP(A)::QAR1(B)
    • Q(c);CHECK,OGATE,XP(C)::QAB(B),XQ(c)
    • R(f);OGATE::R1(H),XR(f)
    • R(f);OGATE,P_SPINR(f),XS(I)::R1(H)
    • R(f);OGATE,XP(K)::R1(H)
  • Tries
    • Try
      • S(G);XR(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,OGATE,XP(C)::QAB(B),XQ(c)
        • Q(c);XP(D)::B(L)+S(I),DCHECK,XQ(c)
      • Refutation
        • P(h);XS(G)
    • Try
      • S(I);CHECK
      • Vars
        • R(f);OGATE,P_SPINR(f)::R1(H)
      • Refutation
        • K(e);P-FLIGHT,P_SPINQ(c),XS(I)
    • Try
      • S(I);CHECK
      • Vars
        • R(f);OGATE,P_SPINR(f)::R1(H)
      • Refutation
        • K(e);P-FLIGHT,P_SPINQ(c)
    • Try
      • S(I);CHECK
      • Vars
        • R(f);OGATE,P_SPINR(f)::R1(H)
      • Refutation
        • K(e);P-FLIGHT,P_SPINQ(c)
    • Try
      • S(I);CHECK
      • Vars
        • R(f);OGATE,P_SPINR(f)::R1(H)
      • Refutation
        • K(e);P-FLIGHT,P_SPINQ(c)
    • Try
      • S(I);CHECK
      • Vars
        • R(f);OGATE,P_SPINR(f)::R1(H)
      • Refutation
        • K(e);P-FLIGHT,P_SPINQ(c)
    • Try
      • Q(B);XQ(c)
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);XQ(B)
    • Try
      • P(K);
      • Threat
        • S(K)
      • Vars
        • Q(c);CHECK,OGATE,XP(C)::QAB(B),XQ(c)
        • R(f);OGATE,P_SPINR(f),XS(I)::R1(H)
        • R(f);OGATE,XS(K)::R1(H)
        • R(f);OGATE::R1(H)
      • Refutation
        • Q(c);XP(D)
  • Actual
    • S(G);XP(g)
    • Threat
      • S(G)
    • Vars
      • Q(c);CHECK,OGATE,XP(C)::QAB(B),XQ(c)
      • Q(c);XP(D)::B(L)+S(I),DCHECK,XQ(c)
      • Q(c);OGATE,P_SPINQ(c),XP(F)::QAR1(B)
      • Q(c);OGATE,P_PINS(G),P_SPINQ(c),XS(I)::P(A)
      • R(f);OGATE,P_PINS(G),P_SPINR(f),XS(I)::R1(H)
      • R(f);OGATE,XP(K)::R1(H)
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